Griffith sits next to 3 phonetic neighbors — Griffin, Griffon, and Geoffrey are the closest matches by sound. Most share Griffith's Welsh cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"strong lord"
"noble, virtuous"
"son of, awakening"
"ford belonging to the king"
"jackdaw (intelligent crow-family bird)"
"bearer of the Aegis (goatskin shield)"
"independent, nonconformist"
"will-bright, famous will"
"son of the supplanter"
"great, kingly"
"Yahweh has remembered"
"son of Ryer, from the rye field settlement"
"modern invented name with Ry- prefix"
"old friend, wise friend"
"black, swarthy"
"thankful, God has heard"
"counsel wolf"
"king, lord, ruler"
"son of Hugh"
Similar sound: These names share phonetic patterns with Griffith — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Welsh origins, giving them the same cultural heritage as Griffith.
Rhythm: Griffith is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.