Is there a leprechaun at the end of a rainbow?

Leprechauns, in Irish folklore, are always encountered as males.

This does not say that there are not female leprechauns - there might be, but they were never reported as having dealings with 'humans'.

The Word is not exclusively male, being derived from the Irish for "small body" - which is asexual.

People believe that there must have been female leprechauns or how else could they reproduce, but as the males encountered are always deemed to be of great age, perhaps they never reproduce. Their 'genealogy' is unrecorded in folklore and they may well have 'just happened'.