These are the still-used comparative and superlative of “old”, but the OED calls them superseded by “older, oldest” and restricted in use, so I’m awarding an “archaic” tag. Those restrictions include formulaic language, such as in legal terminology, earning these words the “high” tag.
- 03.045 “He was the father of the fathers of the eldest race of Dwarves,
- 06.050 One of his elder cousins
- 09.008 who was the eldest left.
- 12.096 of his eldest son
- 18.032 for he was their mother’s elder brother.
- 19.038 in their friendship by their elders.
“elder, adj. and n.3.” OED Online. Oxford University Press, March 2015. Web. 20 May 2015.
“eldest, adj.” OED Online. Oxford University Press, March 2015. Web. 20 May 2015.