Of Scottish origin but now widely used in the English-speaking world. It is derived from a topographic term denoting a narrow strait or channel and in part is a transferred use of the surname, a local name from the region in Ayrshire so called. As a girl's name it appears to have been largely superseded by Kyla.
Scottish and northern Irish: nickname for someone with long legs or some peculiarity of gait, from Old English sceanca ‘shin bone’, ‘leg’. This vocabulary word was preserved in Scotland, whereas in England it was replaced by Old Norse leggr.