Anyway - both being raised in Scotland, with Alex being the same age as Patrick, I'd say they probably know each other, and that therefore Patrick would have some kind of acquaintance with Elaine as well. And he would be very pleased for Alex and his muggle wife. :)
If Florence is a 7th year Gryffindor, she would have been a 4th year during Patrick's 7th year, when he was a Gryff prefect and Quidditch Captain, so she'd probably at least know of him. If she did anything especially memorable, he'd know her as well. :)