By the way, the seal on his forehead means "Love". I don't know if that's irony or sarcasm.
Tweeny-weeny spoiler wrote:
His mother named him Gaara(the word Love on his forehead, for Gaara to love himself and himself only, to live only for himself.
Yashamaru is a man. Hes the brother of Gaara'a mom.
Yashamaru is a boy name.