Dave has it right- a different person.
Jim's bands included skiffle groups, the Marsden Rattlers, the Harvesters and Eddie Groyne and the Strains, but not any 'Irish' ones as far as I know.

He was, however, a great admirer of fiddlers he'd met, like Ted Furey, Bobby Casey, Martin Byrnes (not 'Mairtin' in those days) Michael Gorman and Tom Anderson.