 This has led to speculation that the socks acted as a kind of imperfect, arcane summoning ritual which corrupted Soky's true form; this has never been confirmed by RTE and remains a matter of controversy.The word "morbeg" is derived from the Irish words "mór", meaning big or large and "beag", meaning small or little.The name was inspired by an Irish folk tune, 'Si Beag, Si Mor' [little fairy, big fairy] and was devised by Frances Kay, the script editor.