By exploiting the Jordan pair structure of U-duality Lie algebras in D = 3
and the relation to the super-Ehlers symmetry in D = 5, we elucidate the
massless multiplet structure of the spectrum of a broad class of D = 5
supergravity theories. Both simple and semi-simple, Euclidean rank-3 Jordan
algebras are considered. Theories sharing the same bosonic sector but with
different supersymmetrizations are also analyzed.Comment: 1+41 pages, 1 Table; v2 : a Ref. and some comments adde
