1950 26 219 The suffix is itself meaningless, hardly more than a gender marker.
1975 50 11 Abruzzese and Neapolitan also have final schwa rather than clear gender markers like -o for the masculine singular and -a for the feminine singular.
2002 May 16/2 That Arabic grammar carries gender markers has led even the best Arab grammarians erroneously to attribute gender to the thing referred to.