Ohmer is of Germanic origin, derived from the Old High German name Otmar, which is composed of the elements "Ot" meaning wealth and "Mar" meaning famous. The name was brought to England by the Normans after the 1066 conquest, where it became Ohmer over time. It is a rare name today, with few occurrences worldwide. Ohmer was historically more prevalent in France, Germany, and England during the Middle Ages but has since declined in usage.
"Ohmer was an uncommon name, with only two recorded births over this period."