Meet Kaatjie! Born 1883, she's an incoming first year at Hogwarts, and Don Juan Dempsey's daughter from a secret marriage. Kaat grew up in the Netherlands until her mom died in 1892, and has lived with relatives in Britain ever since. I am seeking probably MCAB relations with a branch I can hijack — ideally, the parent your character isn't immediately related to is Kaatjie's aunt or uncle and can be Dutch.