Gilbertson: Last Name Origin and Family Crest
Some records give Gilbert; others give Gilbertson. Both point to the same English family name.
The extra ending in Gilbertson is patronymic: it identified a person as belonging to Gilbert's family. Census takers and immigration officers often wrote what they heard.
There is no single Gilbertson family crest for every bearer. Herald Lab researches the arms historically associated with the name and explains whose they were. Research your Gilbertson family history with a full surname report and painted coat of arms.