Siar sits next to 4 phonetic neighbors — Sheer, Ciar, and Seer are the closest matches by sound. Most share Siar's Irish-rooted cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"westward, to the west"
"resembling the bright one"
"descendant of Donndubhan"
"gentle birth, beloved"
"son of the wave, born of the sea"
"yew bow warrior, bow army"
"guardian of riches"
"twin (loose association)"
"red king"
"little wolf"
"strong, firm, enduring"
"fair warrior, fair hero"
"from the Liffey valley"
"landholder, lord"
"descendant of the dark challenger"
"from the gray hill"
"dark one, dark-complexioned"
"from Renton, town name"
"son of Roderick"
Similar sound: These names share phonetic patterns with Siar — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Irish Gaelic origins, giving them the same cultural heritage as Siar.
Rhythm: Siar is a 1-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.