Holden sits next to 3 phonetic neighbors — Golden, Holton, and Hudson are the closest matches by sound. Most share Holden's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"deep valley; hollow valley"
"of uncertain origin, possibly barberry hill"
"cloth walker; fuller of cloth"
"just, righteous"
"man, mankind, human"
"phonetic American invention"
"God is gracious"
"home ruler"
"stone"
"keeper of the game preserve"
"fingernail, claw"
"son of Karr"
"peaceful ruler"
"man of prayer"
"Roman pilgrim"
"son of the valiant one"
"God has healed"
"bright fame"
"lover of hounds, wolf lover"
"sawyer, lumber worker"
"southern settlement, south farm"
Similar sound: These names share phonetic patterns with Holden — 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 Holden.
Rhythm: Holden is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.