Tanny is of English origin, derived from the Old English word 'tan' meaning 'brown'. It's often used as a nickname for someone with brown hair or eyes. The name has gained popularity over time and is now considered unisex, although it was traditionally more common among males.
"The name Tanny was quite popular in the late 1940s and early 1960s with a total of ten babies named Tanny during this period."