Cornelia Koster Obituary
The memory of Cornelia Koster (Milwaukee, Wisconsin), who passed away on February 11, 2026 at the age of 95, will forever remain in the hearts of those touched by this precious presence in their lives. Family and friends are welcome to leave their condolences on this memorial page and share them with the family.
She was predeceased by: her husband Henry "Hank" J. Koster; her parents, Julie W. Geary and Francis S. Geary; and her siblings, John (Olive), Robert Geary (Nina) and Mary Patricia Brooker (Kenneth).
She is survived by: her children, Julie, Patti Brant (Larry), Mary Murr, John, James and Kitty Koster; her grandchildren, James (Gabrielle), Ted (Lisa), Patrick Wagor, Lauren Lanza (Mario), Genevieve Koster, Mackenzie Koster (Emalee) and Julia Koster (Gurmukh Mangat); her great grandchildren, Maddie, Ben, Eleanor, Lucille of Joshua, GT, Peter and Carter; her nieces and nephews, Karen Geary, Marguerite Koster (Dan Gershon), Colleen Koster, Darcy DeGarmo, James, Richard Brooker, Kevin, Michael and Tim Geary; and her cousin Janet Armato. She is also survived by other loving relatives and dear friends.
In lieu of flowers, memorials are suggested to St. Robert Parish or to Sharon S. Richardson Hospice.
