As far as I know, I’m the only left-hander in the family. Neither parent nor grandparents were left-handed, so I don’t know what happened. I’m just glad I was born in a more modern time, or I wouldn’t have survived.
Seeing how you're both a Redhead and a Lefty, just be glad you weren't born in some rural, backwater village sometime during early Middle Ages -they might have drowned you in a bucket of water!