Preferebly a KR novel that has a young or a baby reincarnated lead! I'm really really into these type of novels these days so please do recommend me some more of these!
I just re-read your OP and you asked for recommendations of novels featuring reincarnation from birth. Reincarnator doesn't really fit that description, and in fact I've found that a lot of the novels with the reincarnation tag are actually just transmigration stories. Off the top of my head The Legend of Ling Tian is one that features reincarnation from birth, there is a (late in the story) subplot in Warlock of the Magus World that features reincarnation from birth... and I'm drawing a blank for anything else, of what I've read. edit: Desolate Era is another