Where does “Gerritsen” come from?

Gerritsen (English) comes from Dutch Gerritsen, from Dutch Gerrit, from Dutch Gerard, from Old French Gerart, from Frankish Gaiʀahard, from Proto-West Germanic gaiʀ, from Proto-Germanic gaizaz, from Proto-Indo-European ǵʰoysós — winter.

Ancestry of “Gerritsen”, step by step

StepLanguageWordMeaning
1DutchGerritsen—
2DutchGerrit—
3DutchGerard—
4Old FrenchGerart—
5FrankishGaiʀahard—
6Proto-West Germanicgaiʀspear
7Proto-Germanicgaizazspear, pike, javelin
8Proto-Indo-Europeanǵʰoysósthrowing spear
9Proto-Indo-Europeanǵʰey-winter
Every word from Proto-Indo-European ǵʰey- →Every word from Proto-Indo-European ǵʰoysós →Every word from Proto-Germanic gaizaz →