Cyrus sits next to 3 phonetic neighbors — Silas, Kyros, and Cirrus are the closest matches by sound. Most share Cyrus's Persian-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"sun, throne"
"strong ruler, powerful leader"
"little star"
"greatest, largest"
"keeper of the keys"
"to live, to dwell"
"son of Armand, warrior"
"red-haired, ruddy complexion"
"son of Elias"
"dear one of God"
"free man"
"from the eastern homestead"
"the herb sage"
"God is gracious"
"elf counsel, supernatural wisdom"
"rising in the sky, boundary"
"western farmstead, western settlement"
"victory of the people"
"tortoise (alternative Japanese reading)"
Similar sound: These names share phonetic patterns with Cyrus — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Old Persian origins, giving them the same cultural heritage as Cyrus.
Rhythm: Cyrus is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.