Slate sits next to 4 phonetic neighbors — Slater, Blake, and Case are the closest matches by sound. Most share Slate's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"fine-grained grey metamorphic rock"
"parched land, sun-baked land"
"bold, daring"
"companion, close friend"
"from Hadria, near the Adriatic"
"paw, claw"
"heroic, kingly"
"sword, blade"
"power of the homeland"
"gift of God"
"child of Zeus (folk etymology)"
"strong and steadfast"
"power of the people"
"he who holds firm the good"
"lotus sound"
"truthful, sincere, honorable"
"truly brave, genuinely bold"
"wealthy friend, divine wealth"
"Winda's homestead, windy village"
"Yahweh is my strength"
Similar sound: These names share phonetic patterns with Slate — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Old French origins, giving them the same cultural heritage as Slate.
Rhythm: Slate is a 1-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.