Velkan sits next to 4 phonetic neighbors — Vulcan, Falkan, and Velko are the closest matches by sound. Most share Velkan's Slavic-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"great, powerful"
"free man"
"little seal"
"short form of Elizabeth"
"victory, achievement (from laurel symbolism)"
"butcher, one who slaughters"
"ability to obtain or use"
"blessed warrior"
"priceless, inestimable"
"prosperity, fair weather, rich ore vein"
"will, desire, divine purpose"
Similar sound: These names share phonetic patterns with Velkan — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Slavic origins, giving them the same cultural heritage as Velkan.
Rhythm: Velkan is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.