Dependant \De*pend"ant\, Dependance \De*pend"ance\, n., Dependancy \De*pend"an*cy\, n. See Dependent, Dependence, Dependency.

Note: The forms dependant, dependance, dependancy are from the French; the forms dependent, etc., are from the Latin. Some authorities give preference to the form dependant when the word is a noun, thus distinguishing it from the adjective, usually written dependent.

Source: Webster's Revised Unabridged Dictionary (1913)