doxy

Perhaps from Middle Dutch doketje, diminutive of Middle Dutch docke (“a doll”), from Proto-Germanic dokko (“something round”), related to *dukkǭ (“muscle, strength”). Cognate with Low German dokke (“doll”), Saterland Frisian dok, dokke (“a doll”), Swedish docka (“doll, puppet”).

From -doxy in orthodoxy, heterodoxy, etc.

Clipping. From deoxy-.

Clipping of dachshund + -y.

Coined by J.K. Rowling in the Harry Potter series as the name of a species of biting fairy, possibly originally from Etymology 1 or from Etymology 3 (doxycycline is used to treat various diseases caused by insect bites). Likely influenced by pixie.