Name: Marilyn, aka "Poly" South San Francisco Bay Area (Zone 9b) "The mountains are calling..."
Very true, that sometimes you don't know with 100% certainty what the pollen parent was. In that case you could always use Pod Parent Name x unknown.... unless the current registration rules don't allow for such. (Iirc I think that the Reinkes used to charmingly use "x Chance" for bee pods. 'Annabelle's Ghost' was the result of one such "chance" cross.)