Catholic Encyclopedia - St. Sechnall (Latinized form, Secundinus). Bishop, nephew of St. Patrick. First Irish Christian to write Latin poetry. Died 457. www.newadvent.org/cathen/13671b.htm
Catholic Online - Very short paragraph. saints.catholic.org/saints/seachnall.html
For All the Saints - Brief profile of Seachnall of Dunshauglin. users.erols.com/saintpat/ss/1127.htm#sech