Where does “lattis” come from?

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

Ancestry of “lattis”, step by step

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

Words derived from “lattis”

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