there was a previous thread but I'm not able to track it down at the moment

the original is in Scottish Gaelic

Leis a' Lurgainn means With the Lurgann - Dwelly's Dictionary translates Lurgann as "shaft, shin, leg ..." but it seems to be the name of the boat, in another version it's Leis a' Mhaighdinn (with The Maiden)
see Gaelic lyrics and some info at
http://www3.ns.sympatico.ca/macewan/Leis_A_Mhaighdinn.html and

http://www.geocities.com/Area51/Zone/6338/leislurg.html