| Under-skinker | According to The Sailor's Word-Book, published in 1867 by William Henry Smyth, this was a name for an "assistant to the purser's steward." |
| Undertaker | One who aids or assists; a helper. Also, one who makes a business of carrying out the arrangements for funerals. According to Everett B. Wilson in his book Early America At Work, published in 1963, this name (like that of enterpriser) was given to an entrepreneur who assumed the risk and management of business. |
| Underworker | An assistant or subordinate worker. |
| Under-workman | An assistant. |
| Uphalder | A variation in the spelling of the name: upholder. |
| Uphelder | A variation in the spelling of the name: upholder. |
| Upholder | An upholsterer. Also, a dealer in small wares or second-hand articles (of clothing, furniture, etc.); a maker or repairer of such things. |
| Upholdsterer | A variation in the spelling of the name: upholsterer. |
| Upholsterer | A tradesman or shopkeeper whose business is the making, finishing, or repairing of articles of furniture and other house-furnishings in which woven or similar fabrics, or materials used for stuffing are employed. |
| Upholstress | A female upholsterer. |
| Uphoulstarer | A variation in the spelling of the name: upholsterer. |
| Uppolder | A variation in the spelling of the name: upholder. |
| Urle | A variation in the spelling of the name: earl. |
