>>112698>beyond a few morphemes like 美 vs 郎.That's mostly it, there are many common ones like 子, 男/雄, 司 etc. Actually, your Clannad example is one such case (哉/也, 世/代). There are also grammatical patterns, like when verbs are used as names, the plain form tends to be male and the 連用形 tends to be female, as in Nozomu/Nozomi. It's not that clear cut and there are plenty of exceptions, like Hikari being almost exclusively female but Hikaru being gender neutral, and there are also tons of gender neutral names in general like Sora, Asahi and so on, but most names can be guessed accurately.