Under Iowa law, a remainder is generally held to be vested where the beneficiary or recipient of such interest is a presently identifiable person. Houts v. Jameson, 201 N.W.2d 466, 470 (Iowa 1972); Katz Investment Co. v. Lynch, 242 Iowa 640, 47 N.W.2d 800, 806 (1951). A contingent remainder, on the other hand, is one which is limited to take effect "to a dubious or uncertain person or upon a dubious or uncertain event."