'Alpha Whiskey' is used for a singleton and 'Wolf Section' for a formation with Wolf 1/2/3 etc being the callsigns of individual aircraft in that formation.
'Wolf' derives from AW-139 'Wolfhound', the official name of the type in service .
'Irish' is used when an Air Corps aircraft travels abroad so the jury will be out on that one
So if they were a pair it would be Wolf unless of course you heard Medevac 112 which was also busy that night.