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"
"fire, energy (sound symbolic)"
"possible Japanese aesthetic: figure, image"
"nobleman, marquess, border guardian"
"from Rome, Roman pilgrim"
"precious green stone"
"meadow town"
"who is like God? (no one)"
"son of Hugh, spirit"
"broad hillside"
"gate attendant, herald"
"bright day, day's light"
"universe, cosmos"
"the frenzied one, the inspired"
"with melody, melodious"
"of love"
"vigilant in war, son of Cathasach"
"vision, ghost"
"remembered by the Lord"
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.