Well, if you want to get technical, Catholic is from the Greek katholikos, generally translated as Universal
But it is actually a combination of two words:
Kato = According to
Holos = The Whole
In the book of Acts, "ekklesia kath holos," which is translated "the Church throughout all," is where the word "katholos" comes from.
Ἡ μὲν οὖν ἐκκλησία καθ' ὅλης τῆς Ἰουδαίας καὶ Γαλιλαίας καὶ Σαμαρείας εἶχεν εἰρήνην, οἰκοδομουμένη καὶ πορευομένη τῷ φόβῳ τοῦ κυρίου, καὶ τῇ παρακλήσει τοῦ ἁγίου πνεύματος ἐπληθύνετο.
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He is not well informed about the Catholic Church