pronoun/lœʁ/
(to) them
“Je leur ai donné un coup de main.” — I gave them a hand.
Inherited from Middle French leur, from Old French lor, from Latin illōrum, genitive masculine plural of ille. As a possessive it was originally uninflected (as still is Italian loro), but adopted the plural ending in Middle French. Feminine -e was hindered by the analogy of other possessives, all of which have but one plural form and in the case of notre, votre no gender agreement at all.