The common name for an octogenarian is an "elderly person" or simply "octogenarian." This term refers to individuals who are between 80 and 89 years old. Octogenarians often possess a wealth of life experience and wisdom, having lived through significant historical events and cultural changes. As people age, their perspectives and values can also shift, leading to unique insights about life. In many cultures, octogenarians are respected for their longevity and are often celebrated during milestones such as birthdays or anniversaries.