Rook sits next to 5 phonetic neighbors — Duke, Brook, and Luke are the closest matches by sound. Most share Rook's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"a crow-like black bird"
"from the darnel field"
"named after the Parisii Gallic tribe"
"helper of God"
"third son"
"invented American name, possibly river (from Zaire)"
"one who lives by rivers"
"prophet, one who prophesies"
"acquired, possessed"
"forest friend, house friend"
"oak tree ford"
"settlement by the bridge"
"lord of the marches, march warden"
"noble son"
"the frenzied one, the inspired"
"God has remembered"
"standalone phonetic name derived from letter sounds"
"modern invented name with sun/strength connotations"
"old friend"
"vision during sleep, aspiration"
"supported by Yahweh"
Similar sound: These names share phonetic patterns with Rook — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Old Norse origins, giving them the same cultural heritage as Rook.
Rhythm: Rook is a 1-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.