I remember reading somewhere that Arthur Weasley was the youngest son of seven. Firstly is this true/ does anyone know where I read this or did I make it up? I'm pretty sure it was in reference to Ginny being the seventh daughter of a seventh son or something like that.

Therefore secondly does anyone know what happened to these six brothers/ wish to speculate what may have happened to them given Arthur never (as far as I can remember) mentions them? Any info would be great
Alex