doyen \DOY-en; DWAH-yan\ noun
: The senior member of a body or group.
: One who is knowledgeable or uniquely skilled as a result of long experience in some field of endeavour.
doyenne \doy-(Y)EN; dwah-YEN\ noun
: A woman who is a doyen.
French, from Late Latin decanus, "dean". Circa 1670.
This word jumped out at me because it brought back memories of buying my full sized violin at this little shop on Alma Street and W. 12th Ave. The Doyen Violin Shop. =)