Jap is a unisex given name of unknown origin, though it's often associated with Japan due to its similarity to the country's name. It is rare and unique, offering an alternative spelling for those who desire something distinctive.
"The number of births named Jap increased from 5 to 10 between 1918 and 1920, but then fluctuated around the same level of 5 births annually until at least 1923."