Donald Alan Williamson

Tell your own story about Donald

Memories and condolences can be left on the obituary at the funeral home website.

How you can show support

Get email updates whenever changes are made.

Send flowers

Consider sending flowers.

Plant trees

Honor them by planting trees in their memory.

Share this page

Invite other friends and family to visit the page.

Parent-Sorensen Mortuary and Crematory - Petaluma

Posted events

March 29, 2026

Apr

Visitation

4:00 p.m. - 8:00 p.m.

Parent-Sorensen Mortuary and Crematory

850 Keokuk St, Petaluma, CA 94952

Apr

Funeral service

10:00 a.m.

Seventh-Day Adventist Church

495 San Marin Drive, Novato, CA 94945

Parent-Sorensen Mortuary and Crematory - Petaluma

Posted an obituary

March 29, 2026

Donald Williamson Obituary

Passed away on March 24, 2026 in San Francisco. Beloved father of Eric Williamson (Cassandra) of San Luis Obispo and Karra O’Brien (Tommy) of Santa Rosa. Cherished grandfather (Pop) of Thomas (Alyssa), Tyler, William, and Wyatt O’Brien, Vivienne... Read Donald Williamson's Obituary