Doug Boggs, the youngest son of the late Tommy Boggs, Jr. — the legendary lobbyist who led the law and lobby firm Patton Boggs to prominence — is leaving Squire Patton Boggs for Manatt Phelps & Phillips.

The move comes less than a year after the firm that Boggs’ father turned a household name in Washington was absorbed by the larger law firm Squire Sanders following months of financial struggles.

Boggs and two other legacy Patton partners, Joseph Passaic and Alan Noskow, are slated to start Monday at Manatt, where Boggs’ brother T. Hale Boggs is a longtime partner who founded the firm’s Palo Alto office in 1998. The trio will be partners in Manatt’s corporate group in D.C. Passaic and Boggs were members of Patton Boggs’ management committee. Boggs had been at the firm for 15 years.

Dozens of high-profile Patton attorneys left the firm in the months leading up to, and immediately following, the June 2014 merger with Squire Sanders. But Boggs’ departure carries additional symbolic significance, marking the end of his time at the business his family is best known for. Tommy Boggs Jr. died in September.

“There have been a lot of changes here in the last year,” Boggs said. “With my dad’s passing and those changes, I thought it was a good time to explore other opportunities.”

Boggs had only positive things to say about the newly merged Squire Patton Boggs. The firm, he noted, is larger, more corporate and has a different feel in terms of people and culture. Many longtime Patton attorneys who were loyal to his father have since left. Moving on was a personal choice partly tied to his father’s passing, he said.

“I think the firm is great,” he said. “Just for me personally, it became very difficult with all the changes and him not being here … I think my perspective is different than others because of how personal it’s been. I feel more comfortable not having to pass my dad’s empty parking spot everyday and see his empty office. I felt it was time for me to explore something new.”

He said the firm carries on the legacy of the Boggs family.

“I’m very proud of the firm and what my dad created, and what I and other partners helped create,” he said. “I wouldn’t say it’s the end of an era. I’m actually going to join my brother to start a new chapter in the family, but I will remain proud of Squire Patton Boggs and I certainly hope the name stays intact.”

T. Hale Boggs is a partner in Manatt’s corporate group and head of the firm’s digital media consulting business. Manatt also has consulting units in healthcare and global business development. Doug Boggs said that platform will help him and his partners expand their practice — representing financial institutions, private equity funds, foreign governments and other entities in financing infrastructure and other projects — in part by giving them more flexibility in how they charge clients.

“Early-stage financing and doing diligence on deals is hard to do on a standard hourly rate,” he said. “Having the ability to have a consulting arm will greatly aid being able to represent more clients and provide better value to them.”