The Merriam-Webster Dictionary gives this:

consigliere

Main Entry: con·sig·li·e·re

Pronunciation: \kōn-(ˌ)sil-ˈye-re, -ˈyer-ē; kän-(ˌ)si-glē-ˈye-rā, -rē, -ˈyer\

Function: noun

Inflected Form(s): plural con·sig·li·e·ri \-rē\ also con·sig·li·e·res

Etymology: Italian, from consiglio advice, counsel, from Latin consilium — more at counsel

Date: 1615

: counselor, adviser <consigliere of a Mafia family>