Female Thor is a female version of Thor. There is no male version of Black Widow. No male version of Scarlet Witch. No male version of Firestar. No male version of Storm. No male version of Wonder Woman. No male version of Black Canary. I could go on and on – every major original/unique female character has no male version, unless it’s in some one-off or obscure story. I guess technically there is a male version of Zatanna (her father, but I’m not sure he counts.)