Septimius and Caracalla, not Domna. Others: Caracalla Constans Magnus Maximus Magnia Urbica Commodus Constantine I Julius Nepos Valentinian I Uranius Antoninus Maximianus
http://www.wildwinds.com/coins/ric/uranius_antoninus/RIC_03.jpg Compare die. Is there a conventional wisdom explanation to a male rule whose main type is Fecunditas?