Keithan is a modern, unique name of American origin, believed to have been coined in the late 20th century. It is derived from two popular names, Keith and Alan. The name Keith has Scottish roots, meaning "from the fair-haired people," while Alan is a Norman name meaning "noble." Therefore, Keithan can be interpreted as signifying 'fair-haired nobility.'
"Keithan appears to have been a popular name for babies in the late 20th century and early 21st century, with peak years seeing over 30 births annually."