Senex.
Senex is singular in Latin and it means "old man" or "elder." The plural form is senes.
Senator
Senex amat cogitare.
Old, aged, advanced in years or mature
John Senex was born in 1678.
Koyaga senex was created in 1881.
Pietro Senex died in 1134.
Aoraia senex was created in 1908.
Blenina senex was created in 1878.
John Senex died in 1740.
The root word for "senior" is the Latin word "senex," which means old or old man.