Saint Senan of Scattery (Subscribe)
Links
St. Senan
http://www.catholic.org/saints/saint.php?saint_id=318
Says that he met St. David of Wales.
Catholic Encyclopedia
http://www.newadvent.org/cathen/13713a.htm
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.