Squib

Squibs are those who have wizarding ancestry, but have no or very minimal magical talent. Not to be confused with a muggle, who has no wizarding talent and zero magical ancestry. To those who believe in blood purity, squibs are essentially lesser than muggles, and are often cast aside or disowned by their families (i.e. the House of Black, Marius Black). Other wizards like Albus Dumbledore have found ways to give squibs jobs and responsibilities in the wizarding world (i.e. Arabella Figg & Argus Filch).