Kumquat graft question
I bought a kumquat last summer and by fall, all of the leaves fell off. I attributed this to too much water (as it was raining and I left the poor guy outside), so I brought it in. The leaves are starting to come back now, but so are other shoots! I know that kumquats are generally grafted with other citrus, but after searching through leaf images I can't find one that matches. The leaves that mine is growing looks similar to a fig leaf.
Is it possible that it was grafted with a fig? What are kumquats generally grafted with? If it something desirable, can I grow both sides of the tree?