Calla lilies (Zantedeschia)are not true lilies. They are aroids. There is Aroid forum here also. So it would be better to post your questions there. Do the search first, the same questions were asked before many times. It seems that you have at least two different callas in the same pot. They are hardy to zone 9, but may overwinter in your zone with some protection. Let the foliage die naturally, then you can either store the tubers till spring or plant them in the garden and hope that they will survive (mulch them heavily in that case!).
They are beautiful, your husband made a good choice! Good luck!