G'day;John in Brisbane: That is the one - I won't vouch for official names.
Timehiker: The Wedding of Lauchie M'Graw was one of Harry Lauder's songs (often found in a variety of variant names). I recently published a version sung by an old Queenslander bloke, Fred Richards, to a tune played by Sydney/NSW character, Joe Yates, in Mulga Wire #134, August 1999.
This had its own tune ... but this doesn't stop anyone from using an old favourite like Irish Washerwoman.
Regards,
Bob Bolton