  We discuss F-theory SU(5) GUTs in which some or all of the quark and lepton
families are assigned to different curves and family symmetry enforces a
leading order rank one structure of the Yukawa matrices. We consider two
possibilities for the suppression of baryon and lepton number violation. The
first is based on Flipped SU(5) with gauge group SU(5)\times U(1)_\chi \times
SU(4)_{\perp} in which U(1)_{\chi} plays the role of a generalised matter
parity. We present an example which, after imposing a Z_2 monodromy, has a
U(1)_{\perp}^2 family symmetry. Even in the absence of flux, spontaneous
breaking of the family symmetry leads to viable quark, charged lepton and
neutrino masses and mixing. The second possibility has an R-parity associated
with the symmetry of the underlying compactification manifold and the flux. We
construct an example of a model with viable masses and mixing angles based on
the gauge group SU(5)\times SU(5)_{\perp} with a U(1)_{\perp}^3 family symmetry
after imposing a Z_2 monodromy.
