The names Jacob and Joseph are of Hebrew origin; they appear often in both the Old and New Testaments and have inspired innumerable names, both actual and literary, throughout the history of Jews and Christians.
Brown, Russell E.
"Jacob and Joseph as Character Names in Modern Literature,"
Literary Onomastics Studies: Vol. 15
, Article 11.
Available at: http://digitalcommons.brockport.edu/los/vol15/iss1/11