Garrett sits next to 4 phonetic neighbors — Garret, Jarrett, and Gerard are the closest matches by sound. Most share Garrett's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"spear strength, brave with the spear"
"God is my light"
"clerk, scribe, secretary"
"bringer of light"
"world-mighty"
"God is my help, help of God"
"son of Jeffrey, son of God's peace"
"healed by God"
"protector of mankind"
"God is gracious (via John → Jack)"
"of the Cassian family (Roman gens)"
"high, noble"
"king, master"
"free man"
"invented blend name, no classical meaning"
"handsome, cheerful"
"the ram"
"rocky land, stony ground"
"strength of God"
"Yahweh remembers"
"little fawn"
Similar sound: These names share phonetic patterns with Garrett — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Germanic origins, giving them the same cultural heritage as Garrett.
Rhythm: Garrett is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.