Umberto was Pilar's father.

In "Fulgencio", Jay and Pilar clash about the naming of Jay and Gloria's son, Joe. Pilar wants to call him "Fulgencio Umberto Pritchett" (Fulgencio after her late husband and Umberto after her late father), but Jay disagrees and near the end, he is called "Fulgencio Joseph Pritchett", but Jay insists that they will never call him "Fulgencio", but "Joe". The initals spelled F. U. Pritchett, which made Jay feel uncomfortable.