Eldren sits next to 3 phonetic neighbors — Eldon, Aldric, and Eldritch are the closest matches by sound. Most share Eldren's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"old, wise ruler"
"24-hour period"
"from the alder grove"
"field settlement"
"glory of the homeland"
"house of God (possible Bethel derivation)"
"dark river, dark stream"
"sunray, shining light"
"raven"
"Ford by the windy place; a river crossing in a breezy location"
"flower settlement"
"from Flanders, Flemish person"
"skilled metalworker"
"the strait, narrow waterway"
"nobleman, pledge"
"olive tree; symbol of peace and wisdom"
Similar sound: These names share phonetic patterns with Eldren — 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 Eldren.
Rhythm: Eldren is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.