Where does “ipagkaisa” come from?

ipagkaisa (Tagalog) comes from Finnish Kaisa, from Finnish Katariina, from Swedish Katarina, from Medieval Latin Catharīna, from Latin Ecaterina, from Ancient Greek Αἰκατερίνη, from Ancient Greek Ἑκάτη, from Ancient Greek ἑκάς — self.

ipagkaisa (Tagalog): to be united; to be unified