He had one child, Mona Elizabeth Blackett Bower (1903–55), who married James Mitchell (1889-1981). They were the parents of Sir David Bower Mitchell.
Bower died in November 1948, aged 90, when the title became extinct.
Arms: Per pale vert and sable, two longbows bent palewise in fesse or, on a chief of the last a Sword point to the dexter of the second.
Crest: On the wreath of the colours, a bowman in armour, holding in the hands a drawn bow proper.
Motto: "Ad metam"