Grey sits next to 3 phonetic neighbors — Gray, Bray, and Trey are the closest matches by sound. Most share Grey's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"gray-haired one"
"one who lives in a valley"
"muddy place, ditch"
"from the crooked stream"
"God will add, God will increase"
"supplanter, one who follows"
"bringer of treasure (gift-bearer)"
"the one who saves"
"messenger (angelos)"
"the bear"
"gift of the Lord"
"powerful ruler of the home"
"herb farm, meadow settlement"
"the king"
"God is gracious"
"church official, rule of law"
"one who works a lathe, craftsman"
"belonging to Mars, the war god"
"warrior"
"city of the moon"
"passionate, earnest"
Similar sound: These names share phonetic patterns with Grey — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Old English origins, giving them the same cultural heritage as Grey.
Rhythm: Grey is a 1-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.