Methuselah
abecedarian
angel
antediluvian
antique
authority
back number
boss
bwana
certified teacher
chef
chief
church dignitary
conservative
dad
docent
doctor
dodo
dominie
don
ecclesiarch
educationist
educator
elder
elder statesman
employer
fellow
fogy
fossil
fud
fuddy-duddy
goodman
granny
great soul
guide
guru
has-been
holy man
husband
illuminate
instructor
intellect
intellectual
liege
liege lord
longhair
lord
lord paramount
lover of wisdom
maestro
staretsy
startsy