Where does “countersignature” come from?

countersignature (English) comes from English counter-, from Middle English counter-, from Old French countre-, from Old French contre, from Latin contrā, from Latin ubī, from Latin cubī, from Proto-Italic *kʷuðei — where.

countersignature (English): A signature made to confirm or endorse another

Definitions

A signature made to confirm or endorse another

Ancestry of “countersignature”, step by step

Step	Language	Word	Meaning
1	English	counter-	in opposition to
2	Middle English	counter-	—
3	Old French	countre-	Alternative form of contre-
4	Old French	contre	against
5	Latin	contrā	against
6	Latin	ubī	where? in what place?, in which place?
7	Latin	cubī	—
8	Proto-Italic	*kʷuðei	where

Every word from Proto-Italic *kʷuðei →