Alexander is getrouwd met Mary Frances Caulfield op 16 apr 1906 in Boston, , Suffolk County, MA, USA. Mary (dochter van John Thomas Caulfield en Margaret M. Kennedy) is geboren op 8 feb 1884 in East Boston, , Suffolk County, MA, USA; is gedoopt op 10 feb 1884 in East Boston, , Suffolk County, MA, USA; is gestorven op 14 jun 1938 in Revere, , Suffolk County, MA, USA. [Gezinsblad] [Familiekaart]