It would be ton frere(informal) or votre frere(formal). It doesn't matter whether its a girl or boy saying it.
"my brother and me" in French is "mon frère et moi"
For a boy, you would say "allemand" and for a girl, you would say "allemande" in French.
You would say "Je t'aime mon frère" in French to express "I love my brother."
demi frere
J'aimerais un frère
The Hawaiian translation of little brother is "hiapo."
"Brother from another mother" in French would be "frère d'une autre mère."
You can say "mon frère" to mean "my brother" in French.
You would say "Où est ton frère?" in French.
You would say "Je n'ai pas de frère" in French to express "I don't have a brother."
You would write 'Big Brother' as 'grand frère' and pronounce it as grand frer
In French, the word for "the brother" is "le frère."