古英語のhelpan(助ける、支える)から。PIE*kelp(支える、つかむ、保持する)が語源で、helm、helveと同じ。
A domestic servant of American birth, and without negro blood in his or her veins ... is not a servant, but a 'help.' 'Help wanted,' is the common heading of advertisements in the North, when servants are required. [Chas. Mackay, "Life and Liberty in America," 1859].Though help also meant "assistant, helper, supporter" in Middle English (c. 1200).