Ryerson sits next to 4 phonetic neighbors — Ryerson, Emerson, and Anderson are the closest matches by sound. Most share Ryerson's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"son of Ryer, from the rye field settlement"
"great, kingly"
"farm on the ridge"
"nickname form of Roger"
"strong grip, paw"
"warrior, slayer"
"independent, nonconformist"
"to rise, ascend, increase"
"joy, song of life"
"jackdaw (intelligent crow-family bird)"
"to sing, to shout (via Jaron/Yaron)"
"growth, increase, abundance"
"variant of Darrell (beloved)"
"knife, cutler"
"Yahweh saves"
"son of Dax"
"he who holds firm the good"
"fire demon (fictional)"
"good speech"
"friend, ally"
Similar sound: These names share phonetic patterns with Ryerson — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Dutch/English origins, giving them the same cultural heritage as Ryerson.
Rhythm: Ryerson is a 3-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.