A Nonagenarian
A person Aged 90 to 99 years called a Nonagenarian.
A person aged 100 years is commonly referred to as a centenarian.
old
There isn't a particular name for someone between in 50-60 but someone over 60 is usually called an OAP (Old Aged Person).
Teen.
tricenarian
A person between the ages of 40 and 49 is a quadragenarian.
A Person Between The Ages Of Eighty And Ninety Is Called an Octogenarian. (:
A person age 60-69 is a sexagenarian, taken from the Latin for "six."
A person aged 70 years is commonly referred to as a septuagenarian. This term is derived from the Latin word "septuagenarius," which means "seventy." It is used to describe individuals in the age range of 70 to 79 years.
70 - 79 - septuagenarian80 - 89 - octogenarian100 years old - centenarian
centenarian