Quidditch? Quincunx (the 5-dot pattern that represents the number 5 on a die)? Quint (a 5-card straight in card game I play, but also a common abbreviation for quintuplet)?
Not to, uh, quibble, but a quilt isn't a woven blanket. It's a blanket formed by two layers of cloth filled with padding and stitched or tied together. The fabric layers can be made of a woven fabric, but a woven blanket by itself without the layers and filling isn't a quilt.