nep·o·tism 
(nĕpə-tĭz′əm)
(nĕpə-tĭz′əm)n.
Favoritism shown or patronage granted to relatives, as in business.
[French népotisme, from Italian nepotismo, from nepote, nephew, from Latin nepōs, nepōt-; see nepōt- in the Appendix of Indo-European roots.]
nepo·tist n.
nep′o·tistic, nep′o·tisti·cal adj.