Thane sits next to 3 phonetic neighbors — Shane, Theron, and Wayne are the closest matches by sound. Most share Thane's Scottish cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"lord, warrior who holds land by military service"
"gift of God"
"bright water, clean stream"
"hollow stalk, tube"
"courageous, valiant"
"beautiful gaze"
"land of Eoghan (Owen)"
"enclosed pasture by a river"
"son of the ace, son of excellence"
"God is good"
"noble battle maiden (via Audrey)"
"gift of God, gift of Yahweh"
"descendant of the fair one"
"place name: town in Pembrokeshire, Wales"
"son of Thomas, son of the twin"
"from the Lennox region of Scotland"
"strife, contest"
"spark, smoldering fire"
"bone"
"gift from God (popular interpretation)"
"payment, brow, forehead"
Similar sound: These names share phonetic patterns with Thane — 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 Thane.
Rhythm: Thane is a 1-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.