St. Senan - Says that he met St. David of Wales. - http://www.catholic.org/saints/saint.php?saint_id=318
For All the Saints - Gives as a variant name Senames of Inis Cathaigh. - http://www.saintpatrickdc.org/ss/0308.htm#sena
Catholic Encyclopedia - St. Senan, sixth-century Irish missionary, bishop, and confessor. Was revered even in his earthly life for his sanctity, being visited by Sts. Ciaran and Brendan. - http://www.newadvent.org/cathen/13713a.htm