Seager sits next to 4 phonetic neighbors — Seeger, Seger, and Cedar are the closest matches by sound. Most share Seager's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"sea warrior, sea spear"
"bird-like, of the birds"
"worker, one who builds"
"thankful, he will judge"
"firebrand, sword blade"
"white settlement, white farm"
"brave warrior (via Wyatt)"
"thicket keeper"
"lord, prince"
"born at daylight"
"reddish complexion"
"hollow stone, hollow hill"
"woodland clearing, meadow"
"broad valley"
"royal town or manor"
"powerful, compassionate (fictional origin)"
"descendant of Ógán"
"who is like God"
"that which is yet to come"
"modern phonetic variant of Jay-ko"
"lord have mercy (liturgical phrase)"
Similar sound: These names share phonetic patterns with Seager — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Old English sae + gar origins, giving them the same cultural heritage as Seager.
Rhythm: Seager is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.