Very little detail is given about Adrahil in canonical sources. The dates given here are derived from volume XII of The History of Middle-earth.
2
Adrahil's name appears to originate from the native Númenórean tongue of Adûnaic. The -hil ending probably means 'Man', but the adra- element remains obscure.
3
Adrahil's eldest child, his daughter Ivriniel, is not named outside volume XII of The History of Middle-earth. She was born in the year III 2947, and was thus eight years older than Imrahil, but other than that no details of her life are known.