tons of 1st gen idols do
all of ses have kids: bada has a daughter, eugene has 2 daughters, and shoo has a son and 2 daughters. all their daughters' names begin with the letter r/l (cause it's the same in korean, ᄅ) and i think that's cute
h.o.t's moon heejun and crayon pop's soyul have two kids - daughter heeyul (nicknamed jam jam) and son heewoo.
coming to 2nd gen, out of wonder girls i know sunye has 3 daughters, and hyerim has one son and is pregnant with her second.
and ofc i don't think i can forget the reveal of that uniq guy who had secretly gotten married and had a kid. that was lowkey iconic ngl