-ianus simply forms adjectives base on the root noun, so it has a wide range of meanings depending on context, not just "belonging to", including "of" "for" "beside" "from" "like" etc.
Ulpiano seems to signify someone from a location (e.g. Municipum Ulpiana in Kosovo) named for the Ulpii family or an individual of the family, esp. emperor
Marcus Ulpius
Trajan. Ulpius/Ulpia doesn't mean anything in Latin, but the Ulpii were an Umbrian family, so it may be from the poorly recorded Umbrian language and cognate with wolf, lupus, lukos etc.
This message was edited 11/20/2019, 3:09 AM