Methuselah

I liked it at first, but then I realized it had "meth" in it.

Meth is a horrible nickname to go by.

Ew, old man name. Can't see it on a baby.

Sounds rather strange on the tongue, and should really be a female name. Then again, I don't really like names from old times.

Don't like at all. Too bizarre and pretentious and the "Meth" part is way too blatant to me. It sounds like a name either an overly religious or fried-for-brains parent would give their child.

This name makes me think of a mythical sea creature, like a massive underwater dragon or Cthulu-like monster. It just sounds like something out of an old fantasy novel featuring mages and dragons. I can't really see it on a human being, but I do like it and would definitely use it in one of my short stories if I ever needed the name for a mysterious lake-dwelling many-tentacled monster that only the oldest man in the village has ever seen.

It does sound a bit "out there" nowadays, but I think it sounds cool. I probably wouldn't use it, but it's cool.

My ancestor was Methusalem, a variant of Methusaleh. It's a good name to give to a kid, being prophetic of long life. It was prophetic in my ancestor's case. He was Welsh, by the way.
I think it's interesting that people wonder why this name isn't used very much. It definitely doesn't sound as long as Bartholomew or even Christopher, but people use them (not that they're bad names). And you can actually use Matt as a nickname with Methusaleh, because of the French form Mathusalem.

Sounds very snobbish and rather obvious that the parents are fundamentalist Christians. I wouldn't even use this on a fictional character.

Well, I'LL be using this name for a fictional character. It reminds me of a wise, kind old man, which I guess was influenced by the character from the Redwall book series.

I wonder why no one names their children Methuselah. It does have a sort of strange sound to it, but if people actually used it, I don't think we would find it strange. Anyway, if you want a very unused name for your son, name him Methuselah.