Springer sits next to 5 phonetic neighbors — Spencer, Hunter, and Fletcher are the closest matches by sound. Most share Springer's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"one who lives near a spring or who springs"
"possessing unlimited power"
"narrow strait, channel"
"intelligence, mind"
"Open land, wide expanse; one who ranges freely"
"of great stature, the great one"
"covered in frost, icy"
"dear one, beloved by the pool"
"from the hall or manor house"
"victory of the people"
"of the highest class or quality"
Similar sound: These names share phonetic patterns with Springer — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Old English / Middle English origins, giving them the same cultural heritage as Springer.
Rhythm: Springer is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.