Where does “latis” come from?

latis (Middle English) comes from Middle French lattis, from Old French lattis, from Old French latte, from Frankish *lattu, from Proto-Germanic laþô, from Proto-Indo-European (s)lat- — beam; log.

Ancestry of “latis”, step by step

StepLanguageWordMeaning
1Middle Frenchlattislathing
2Old Frenchlattis—
3Old Frenchlattea lath
4Frankish*lattu—
5Proto-Germaniclaþôboard; shelf; bar; shutter
6Proto-Indo-European(s)lat-beam; log

Words derived from “latis”

Every word from Proto-Indo-European (s)lat- →Every word from Proto-Germanic laþô →Every word from Frankish *lattu →