Ethen sits next to 4 phonetic neighbors — Ethan, Eton, and Eden are the closest matches by sound. Most share Ethen's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"strong, firm, enduring"
"little fire"
"firm belief in reliability"
"variant of Riley: valiant, courageous"
"of Mars, dedicated to the war god"
"will-helmet (determined guardian)"
"worker, one who builds"
"the cleansing one, the rinser"
"third son with divine grace"
"like life force, vibrant"
"young, youthful"
"dark one, dark-haired"
"noble, virtuous"
"worker in hard materials"
"head of the pass"
"modern invented name, creative variant"
"from the island of Cyprus"
"elaborated form of Joshua"
"God the most high (via Omari)"
"dweller near ash trees"
"of the forest, wood (inspired)"
Similar sound: These names share phonetic patterns with Ethen — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Hebrew origins, giving them the same cultural heritage as Ethen.
Rhythm: Ethen is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.