Where does “tigste” come from?

tigste (Dutch) comes from Dutch tig, from German zig, from German -zig — -ty.

Ancestry of “tigste”, step by step

StepLanguageWordMeaning
1Dutchtigtens, dozens, lots
2Germanzigumpteen, tens of, dozens of
3German-zig-ty
Every word from German -zig →Every word from German zig →Every word from Dutch tig →