α. 1800s– bobe Brit. /ˈbɒbə/, /ˈbɒbi/, U.S. /ˈbɔbə/, /ˈbɔbi/, 1900s– bobbe, 1900s– bobbeh, 1900s– bobeh.
β. 1800s– bube, 1900s– buba, 1900s– bubba, 1900s– bubbe, 1900s– bubbeh, 1900s– bubeh.
γ. 1900s– bobbie, 1900s– booby, 1900s– bubee, 1900s– bubbie, 1900s– bubby.
δ. 1900s– booba, 1900s– boobah, 1900s– boobe.
Also with capital initial.