Bayard Martensen: Age, Career, Family and Brothers

Bayard Martensen is the older half brother of actors Charlie and Max Carver. Born in 1978, he works in investment management. Same father, different mothers. That’s the whole family link. He’s not a twin, he’s not a triplet, and he’s never acted. Secondary sources tie his career to Cactus Investment Management and Polyana LLC. We couldn’t confirm titles or dates in public filings. He has no verified social media either. Net worth numbers online? Pure guesses. Below, we separate what records support from what websites keep copying, and we show you where to look. You’ll get his age, his parents, a simple family tree, and a career timeline you can check yourself.

Quick Facts

Who Is He, and Why Do People Search for Him?

Bayard Martensen is a private man, and most people find his name by accident. They’re reading about Charlie and Max Carver. The twins played Preston and Porter Scavo on Desperate Housewives. Later they played the werewolves Aiden and Ethan on Teen Wolf.

Somewhere in those biographies, an older brother pops up. Fans have never seen him on screen. So they search. How old is he? What does he do? Is he famous too?

Not really. He has no acting credits and no public interviews. What you find online is a small pile of facts copied from site to site. Some of it is right. A lot of it is padded or wrong. We checked each claim against records wherever we could.

How Is He Related to Charlie and Max Carver?

Bayard and the twins share a father. That makes him a half brother, meaning they have one parent in common.

The twins’ mother is Anne Carver, a philanthropist and community activist. Bayard’s mother is reported to be Phoebe Cutler. Dr. Robert Martensen connects the two families.

Before acting, the twins used the names Charlie and Max Martensen. Carver matches their mother’s name. Anne later married Denis Sutro, and in 1992 the family moved to Calistoga, in California’s Napa Valley.

One biography says Bayard grew up mostly with his mother after his parents divorced in the 1980s. With a ten year age gap, that makes sense. Here’s the family at a glance:

• Robert Martensen, 1947 to 2013
  • With Phoebe Cutler: Bayard, born 1978 (reported)
  • With Anne Carver: Charlie, born July 31, 1988, and Max, born August 1, 1988

Bayard Martensen’s Age and Birthday

Birth Year and Age in 2026

Most biographies say 1978. No official record is public. If that year is correct, he’s 47 or 48 this October, depending on his birthday.

Watch out for sites that print one fixed age. It goes stale within a year. A birth year ages better.

Why His Birthday Isn’t Public

No reliable source gives a month or day. That’s common for private people. Birth dates also feed identity fraud, so many keep them offline. Sites that list an exact date don’t show where it came from. We left it out.

The Gap With the Twins

Bayard is about ten years older than Charlie and Max. The twins have their own surprise. They were born on different days. Charlie arrived on July 31, 1988. Max followed seven minutes later, after midnight, on August 1. Max has pointed this out on Instagram.

Who Are His Parents?

Robert Martensen, Physician and Historian

Robert Lawrence Martensen was born January 1, 1947, in Lake County, Ohio. He died September 26, 2013, in Pasadena, California. Wikipedia lists these details and cites the NIH Office of History.

He was an emergency and intensive care doctor. He also taught bioethics and medical history at Harvard Medical School, the University of Kansas Medical Center, and Tulane University. After Hurricane Katrina, he moved to Maryland and led the Office of History at the National Institutes of Health.

On the education side, he earned a bachelor’s degree at Harvard in 1969 and a medical degree at Dartmouth in 1974. In 1993 he finished a Ph.D. in history at the University of California, San Francisco.

A 2002 Guggenheim Fellowship backed his book The Brain Takes Shape, which Oxford University Press published in 2004. His 2008 book, A Life Worth Living, came from Farrar, Straus and Giroux. The New York Times interviewed him in 2009, and NPR’s Fresh Air covered the book that year. Of everything in Bayard’s family story, this part is the easiest to confirm.

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Phoebe Cutler, Landscape Architect and Author

Several biographies name Phoebe Cutler as Bayard’s mother. Her work, at least, is easy to verify. She wrote The Public Landscape of the New Deal, published by Yale University Press in 1985. It explains how New Deal programs built parks, towns, and conservation projects across the country.

Library catalogs also list her book America in Bloom, about great American gardens open to the public. In 1989 she wrote a book review for Landscape Journal.

Geographer Gray Brechin says her research began with a master’s thesis in landscape architecture at the University of California. Some sites call her an architect. Her field is landscape architecture, the design of parks, gardens, and public spaces.

Education

Several Biographies say Bayard earned an economics degree at the University of California, Santa Barbara. We found no university record that confirms it. Schools rarely publish that kind of detail.

An economics degree fits a finance career. It teaches you to read markets, data, and risk. For now, call the degree reported, not proven.

Career Timeline

Bayard Martensen’s work history comes from secondary sources, so the table marks each item with its status.

A managing member runs a limited liability company, or LLC. That’s a business structure that protects the owners’ personal assets. In a small investment firm, the managing member usually makes the big calls.

The table gives you the order of events. It can’t give you exact years or titles. Only primary records can do that.

How to Check His Work History

You can verify this yourself. The U.S. Securities and Exchange Commission runs the Investment Adviser Public Disclosure website. Search a firm’s name and read its Form ADV. That form lists ownership, location, and key staff.

California and New York also keep business registries with LLC filings. Between the two, you can confirm names, dates, and roles. A missing record proves nothing, though. Some small firms register in other ways.

One more warning. Don’t mix up Cactus Investment Management with Cactus, Inc., an unrelated public company in a different industry.

Net Worth

Nobody can give you a real number. Private LLCs don’t publish what their owners earn or own, and Bayard files no public financial statements.

Some sites say $500,000 to $1 million. Others say up to $9.3 million. None names a source. When a range is that wide, someone is guessing.

Net worth is simply what you own minus what you owe. Only he and his advisers know it. If a page states it as fact, move on.

Bayard and His Brothers Compared

Charlie also performed on Broadway in The Boys in the Band and starred in American Horror Story: NYC in 2022. Max appeared in the first season of The Leftovers, where Charlie also had a role.

Side by side, it’s three brothers with very different public lives. Two work on camera. One doesn’t.

Is He a Twin or a Triplet?

No. Bayard isn’t a twin, and he isn’t part of a triplet set. Charlie and Max are the identical twins. Bayard was born about ten years earlier, to a different mother.

So why the mix up? The three brothers show up together on biography pages. Search suggestions link their names. And sites copy each other’s mistakes.

You may even see “Bayard Carver” online. That’s wrong too. His surname is Martensen.

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Does He Have Social Media?

No verified public accounts exist for Bayard, and we found no interviews. Accounts using his name are probably fan pages or fakes. Don’t trust a screenshot unless you can see its source.

Many finance professionals keep a low profile, partly because of client confidentiality. Bayard hasn’t explained his own reasons. Anything a website says on that is a guess.

He’s a private citizen. Please don’t share his address, family details, or photos without consent.

Myths vs. Facts

Frequently Asked Questions

Who is Bayard Martensen?

He’s an American investment manager, born in 1978 according to most biographies. He’s the older half brother of actors Charlie and Max Carver. They share a father, Dr. Robert Martensen. He has no acting career and no verified social media.

How old is Bayard Martensen?

If the reported 1978 birth year is right, he’s 47 or 48 in 2026. His exact birthday isn’t public. Be wary of sites that give a precise date with no source.

What does he do for a living?

Reports call him an investment manager. Sources link him to Cactus Investment Management in San Francisco and Polyana LLC in New York. We couldn’t confirm titles or dates through primary filings, so treat those details as reported.

Is he Charlie Carver’s brother?

Yes, as a half brother. He and Charlie share a father, Robert Martensen. Their mothers differ. Charlie’s mother is Anne Carver. Bayard’s is reported to be Phoebe Cutler. The age gap is about ten years.

Is Bayard Martensen on Instagram?

No verified account exists. Pages using his name are likely fan accounts or fakes. We found no public interviews either.

What is his net worth?

No verified figure exists. Online guesses run from $500,000 to $9.3 million, and none cites a source. Private firms don’t publish what their owners are worth.

Were Charlie and Max Carver born on the same day?

No. They’re identical twins with different birthdays. Charlie was born July 31, 1988. Max came seven minutes later, on August 1, because the birth crossed midnight.

Who is Bayard’s mother?

Reports name Phoebe Cutler, a landscape architect and author. She wrote The Public Landscape of the New Deal, published by Yale University Press in 1985.

Conclusion 

Bayard Martensen is an American investment manager, reportedly born in 1978. He is the older half brother of actors Charlie and Max Carver. They share a father, Dr. Robert Martensen, but have different mothers. Bayard is not a twin, a triplet, or an actor. His mother is reportedly Phoebe Cutler, a landscape architect.

Reports tie him to Cactus Investment Management and Polyana LLC, though public filings don’t confirm titles or dates. He has no verified social media, and net worth figures are guesses. The twins have different birthdays, July 31 and August 1, 1988. SEC records can verify his work.