Lance Armstrong

(male) Old French form of the Germanic personal name Lanzo, a short form of various compound names beginning with land ‘land, territory’ (compare Lambert), but associated from an early date with Old French lance ‘lance’ (the weapon, from Latin lancea). The modern use as a given name most probably arose as a transferred use of the surname derived from the medieval given name, although it is also commonly taken as a short form of Lancelot.

English (common in Northumberland and the Scottish Borders): Middle English nickname for someone who was strong in the arm.