Greyson sits next to 3 phonetic neighbors — Grayson, Mason, and Jason are the closest matches by sound. Most share Greyson's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"son of the grey-haired one"
"just, righteous"
"son of Harry (Henry)"
"chosen savior"
"son of Jack"
"a church official or head"
"little warrior"
"gift of God"
"wayside land, roadside settlement"
"lion-bold; brave as a lion"
"servant of Jesus"
"gift of God"
"ascended, high"
"From the Scottish place name Logan; a topographic name from Gaelic ..."
"dog (symbol of loyalty)"
"little fire"
"gift of Yahweh"
"Poecc's estate; Poecc's settlement"
"father of many nations"
"animal enclosure, warren"
"greatest"
Similar sound: These names share phonetic patterns with Greyson — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have English origins, giving them the same cultural heritage as Greyson.
Rhythm: Greyson is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.