Grayson sits next to 3 phonetic neighbors — Mason, Jason, and Greyson are the closest matches by sound. Most share Grayson's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"From the English surname 'son of the grieve (estate overseer)' or 'son of Gray'; a surname used as a modern first name"
"son of Harry (Henry)"
"man from Laurentum"
"fortunate, prosperous"
"at the ash tree"
"upright, fair"
"bright fame"
"defender of men"
"Supplanter; one who follows at the heel"
"soldier"
"gift of Yahweh"
"earth (in Arabic, adama)"
"strength, dominance"
"lion-bold; brave as a lion"
"magic dignity"
"breath, vapor, impermanence"
"the Lord is my God"
"brave, lion-hearted"
"divine"
"son of the grey-haired one"
Similar sound: These names share phonetic patterns with Grayson — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have English origins, giving them the same cultural heritage as Grayson.
Rhythm: Grayson is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.