Shea sits next to 4 phonetic neighbors — Shay, Chase, and Jay are the closest matches by sound. Most share Shea's Irish-rooted cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"hawk-like"
"spear, marksman"
"light, happiness (Ko in Japanese)"
"modern coined name, variant of Kyson"
"my messenger, my angel"
"mill town, settlement by the mill"
"linden tree, lime tree"
"one who resembles God"
"black gemstone (fossilized wood)"
"modern invented name, valley dweller (from -den suffix)"
"the Nubian, dark-skinned"
"alder tree"
"protected by Yahweh"
"God is gracious (John root)"
"east settlement, eastern village"
"quiet, calm, reserved"
"supplanter, may God protect"
"courageous, valiant"
"wealthy protector"
"swift projectile, arrow"
"dweller by the cliff ford"
Similar sound: These names share phonetic patterns with Shea — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Irish Gaelic origins, giving them the same cultural heritage as Shea.
Rhythm: Shea is a 1-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.