Tom Riddle gets his yew and phoenix feather wand at Ollivander’s

Young Tom Marvolo Riddle receives a wand made of yew wood with a phoenix feather core at Ollivander’s before he starts at Hogwarts (PS5).

Harry Potter’s holly wand also had a phoenix core, making them “brother wands,” and leading to the Priori Incantatem effect years later in the Little Hangleton graveyard (GF34).

Dumbledore’s pet phoenix, Fawkes, gave the feathers for both wands (PS5, GF36).