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"
"tiller of the soil, agriculturalist"
"soldier"
"dark red, crimson"
"earth (in Arabic, adama)"
"wealthy companion"
"one who resembles God"
"my messenger, my angel"
"great king"
"father of peace"
"prince, commander"
"glorious fighter"
"the Lord is my God"
"modern coinage combining Jay + Len"
"descendant of the red-haired one"
"born of fire"
"crooked river, winding stream"
"swift, alert"
"Italian form of John, gift of God"
"friendly, allies, friend"
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.