Demp·sey 
(dĕmpsē), William Harrison Known as "Jack." 1895-1983.
(dĕmpsē), William Harrison Known as "Jack." 1895-1983. American prizefighter who won the world heavyweight title in 1919 but lost it to Gene Tunney in 1926.
Jack Dempsey- protohistorian
- protohistoric
- protohistory
- protohuman
- Proto-Indo-European
- protolanguage
- protolithic
- protomartyr
- protomorph
- protomorphic
- proton
- protonema
- protonemal
- protonematal
- protonic
- protonotary
- protonotary
- protonotary apostolic
- proton-proton chain
- proton pump inhibitor
- proton synchrotron
- proto-oncogene
- protopathic
- protopathy
- protoplanet