Flint sits next to 3 phonetic neighbors — Flynn, Kent, and Grant are the closest matches by sound. Most share Flint's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"hard grey quartz, fire-making stone"
"sea fortress"
"wealthy and powerful"
"eternal"
"champion, cloud"
"little red-haired one"
"of the eighth"
"one who serves"
"God has remembered"
"a type of ocean fish"
"fortunate, blessed"
"companion, friend"
"mythic bird of rebirth and renewal"
"modern invented combination"
"gift of Yahweh"
"anointed one"
"deserving, worthy"
"to tame, subdue"
"given by God"
"son of Madoc, fortunate"
"settlement of a sword-bearer"
Similar sound: These names share phonetic patterns with Flint — 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 Flint.
Rhythm: Flint is a 1-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.