Ryder sits next to 3 phonetic neighbors — Tyler, Rider, and Syder are the closest matches by sound. Most share Ryder's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"mounted warrior, horseman"
"who is like God?"
"Roman colony at the lake"
"blazing iron"
"native Hawaiian hardwood tree"
"ruler of the estate"
"twin, double"
"between two hills"
"little fire"
"little red-haired one"
"God is my power"
"little fire (via Aidan variant)"
"messenger of God, divine messenger"
"he who carries the heavens"
"appointed by God"
"son of Brice"
"growth, abundance (speculative)"
"tumult, noise"
"protector of humanity"
"ash tree town"
Similar sound: These names share phonetic patterns with Ryder — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Middle English origins, giving them the same cultural heritage as Ryder.
Rhythm: Ryder is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.