Jerran is of English origin, derived from the Norman French 'Jérôme,' which means 'to appoint' or 'to dedicate.' It is a variant spelling of the name Jeremiah and Jerome. The name gained popularity in England after the Norman Conquest in 1066, when it was introduced by the Normans who settled there.
"The name Jerran experienced its peak popularity in the late 80s to early 90s with nine births each year from 1987 to 1989, and an additional peak in 1990 with eleven births. However, it has since declined significantly, with only five or fewer births recorded annually from 2001 onwards, except for a brief spike of ten births in 2002."