Tanera Mor - St Martin

Last residents to leave the Summer Isles of Scotland. Tanera Mor - Its written that a monastery was built there in 300AD in the name of St Martin. Is that true!
 
http://www.dailymail.co.uk/travel/travel_news/article-2841153/Tanera-Mor-Scotland-s-Summer-Isles-loses-s-remaining-residents.html

This seems to be the closest to the date. St Martin of Tours. The Catholic monks sure did teach some strange things based upon the texts they were allowed to see.

http://www.catholic.org/saints/saint.php?saint_id=81