Dh was 25, about to turn 26 when our first was born. I would consider that young.
In retrospect, it was a perfectly fine time, as all worked out well (I was older so we needed to get a move on it if we wanted to have more than one and not close together).
But I'm sure his family may have had reservations and his friends probably thought he was bonkers (was the first to have a child by about 5 years). But they probably felt the same about us getting married so young too (24). Me personally, as a parent, I'd feel worried about my child getting married and having a baby so young, even though it was the right thing for us at the time.