Latin word signare comes from Proto-Indo-European *sēik-, Dutch sein (Signal.)

Detailed word origin of signare

Dictionary entry	Language	Definition
*sēik-	Proto-Indo-European (ine-pro)
sein	Dutch (nld)	Signal.
signum	Latin (lat)	(Medieval Latin) a signum (medieval tower bell used particularly for ringing the 8 canonical hours). A mark, sign, emblem. A miracle.
signatura	Latin (lat)

Words with the same origin as signare