Karston sits next to 5 phonetic neighbors — Carsten, Garston, and Carson are the closest matches by sound. Most share Karston's Scandinavian cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"Christian, follower of Christ"
"noble, distinguished"
"from Pacy-sur-Eure"
"manly beauty, sun god"
"God is gracious (short form of Johannes)"
"of Mars, warrior spirit (Mars element)"
"he who supplants, holds by the heel"
"noble lineage (adal) and eager (funs)"
"his peace"
"wisdom, scientific wonder (modern cultural meaning)"
"joyful celebration, festivity"
"unique, invented name with prince-like echoes"
"resolute protector"
"the sky, royalty"
"modern coinage combining Jay (God) and -ren suffix"
"from Dreux (ancient French city name)"
"variant spelling of Dylan"
"cinnamon-like spice"
"one who resembles God"
"attached, joined"
"energy, spirit, vigor"
Similar sound: These names share phonetic patterns with Karston — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Latin via Scandinavian origins, giving them the same cultural heritage as Karston.
Rhythm: Karston is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.