Recorded as Bill, Bille the diminutive Billie, and possibly others, this is an English surname. It has two possible origins. Firstly it may derive from the Olde English pre 7th Century "bil", meaning a sword or halberd, and hence somebody called Bil after the sword or possibly as a nickname of occupation for one who made such weapons.

The name Bills is part of the ancient legacy of the Anglo-Saxon tribes of Britain. The name was taken on by someone who worked as a maker of polearms or halberds and billhooks as these were common weapons in early times. The name could also be a baptismal name derived from son of William, although this latter origin is less likely.

Firstly, it may be derived from a Germanic personal name, either a short form of compound names such as Billard (from the Germanic personal name "Bilhard", from "bil", sword", and "hard", brave, hardy, strong), and Billaud (from the Germanic personal name "Bilwald", composed of the elements "bil", sword, and "wald", rule); or it may be a byname "Bill (a)", from the Olde English pre 7th Century "bil", sword, halberd.

English: topographic name for someone who lived on or by a promontory or headland from Middle English bile bille ‘beak’ (from Old English bile). German: from an ancient Germanic personal name either a short form of compound names such as Billard.