Religious names often seem like jokes, imho

I grew up in rural Southern NC, so lots of VERY Christian people, fanatic like love for Jesus. So, I have seen my fair share of David, John, Adam, ect on the Bible names. I've even seen my fair share of Navaeh's. But recently I started a job and I met this guy. He is the nicest guy, and his brother has a semi regular name. But his name is Messiah. He goes by Siah usually, but it's because people always ask him if it's his real name. Like, they think he is some ding-dong who calls himself Messiah bc he wants to? I've seen people chastise him for having the name, that its disrespectful, and I've had people love it. But mostly, I've heard people think its a joke and I kind of agree.

Why would you name your kid Messiah? Just feels... cocky and kind of silly to me. Is it silly or am I just a traumatized ex-religious person?