Ollivander remembers making and selling every wand that does him harm while he’s in the Malfoy basement.
It’s a matter of status in the castle, who the House team players trust to keep their wands during matches. Madame Hooch, by tradition, keeps the Captain’s wand, but usually the person the players trust the most keep their wands.
James and Sirius were so close, they could use each other’s wands interchangeably, with no adverse effects on their magic.
Wixen tend to be buried with their wands. Cremation, though can’t apply to wands. They won’t burn. Urns are typically sold with a slot on the side for the wand of the deceased.
Luna’s wand, an occamy feather core, was a family heirloom, something her father’s family line had kept until it chose someone. It chose her when she was eight, the day after she learned about occamies from a moving picture book, and passed the bookshelf where the wand box was kept. It jumped off the shelf towards her.
Fred and George have wands of the same wood and the same length, with different cores. The wands look the same, but have a different feeling to them.
After the end of the war, and after using borrowed wands for a few weeks, Hermione spent a few hours in Olivander’s shop looking for a new one. It took just as long to find her a second wand as it did to find the first, but the fit was just as right.
Parvati Patil is teeny tiny, but her wand is the longest in her year.
Fenrir Greyback used to own a wand, but it snapped during a skirmish with some Order members during the first war. He realized that day that he didn’t need one.