Shayan sits next to 3 phonetic neighbors — Shaina, Shannon, and Shana are the closest matches by sound. Most share Shayan's Persian-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"fitting, suitable"
"helper, protector"
Similar sound: These names share phonetic patterns with Shayan — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Persian origins, giving them the same cultural heritage as Shayan.
Rhythm: Shayan is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.