The McKay Surname or Clan from Scotland

Are there any McKays on GenealogyWise? My Mother was a McKay, and we were told that our McKays were Scots Irish, which leads me to believe that they could be from the Ulster area. I do know that we have a McKay that was a tailor in Edinborough, Scotland in the 1800's... My mother was born Arlene McKay, and her parents were Arley Anderson McKay and Mary Jewel Rosinbaum. I don't know Arley McKay's parents' names, but Mary Jewel Rosinbaum's parents were Arthur (C.?) Rosinbaum and Lelah Sellers. Arley McKay had two brothers, Eli McKay and Samuel McKay, and a sister Ether(?) McKay. The McKays lived in Oklahoma (Anadarko and Chickasha), and moved to Wichita Falls, TX. That is all I know about my McKay family background.