This form 'eldery' is sometimes used instead of 'elderly' to mean old people. It is seen in some dialects or informal speech. It means people who are older or senior.
The eldery need care and support.
Eldery people often like to rest.
'Eldery' is often a wrong spelling of the word 'elderly'. People sometimes write it by mistake. It means old people but is not standard English.
She is eldery but very active.
The eldery live in that house.
Sometimes in old texts, 'eldery' means the quality of being older or having senior status. It shows respect and rank. This use is very rare today.
His eldery is respected by all.
The eldery of the village makes decisions.
Sometimes people use 'eldery' as an adjective to describe something related to older people. This use is rare and not very correct, but it appears informally.
She gave eldery advice to the group.
Eldery care is important in society.
Though extremely rare, 'Eldery' could be a family name or proper noun in English. This use would refer to a person or family name, not a common noun.
Mr. Eldery arrived at noon.
The Eldery family owns the land.