Thayne sits next to 4 phonetic neighbors — Shane, Thane, and Blaine are the closest matches by sound. Most share Thayne's Scottish cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"warrior, military companion"
"security token"
"invented modern name"
"son of Kyle"
"named for gold prospector Joe Juneau"
"speech, language, of God"
"Gaelic diminutive form of Ferdinand"
"land by the winding stream"
"divine, godlike"
"son, born of"
"forever, always + wind/fighter (Ey + vindr etymology)"
"raven"
"summoner, one who calls forth"
"from Renton, town name"
"ardor, enthusiasm (from Welsh Rhys)"
"salmon"
"modern invented name"
"beloved"
"divine strength"
"from the new estate"
"Beorhtsige's town"
Similar sound: These names share phonetic patterns with Thayne — 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 Thayne.
Rhythm: Thayne is a 1-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.