Syre sits next to 4 phonetic neighbors — Sire, Cyrus, and Myer are the closest matches by sound. Most share Syre's Scandinavian cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"victory"
"ocean person"
"who is like God? (no one)"
"flowing down, descend"
"strength and help of God (combined from Ezra and Azariah)"
"from the swampy land"
"village by the street"
"celestial body"
"phonetic blend (possibly new house, or river)"
"from Rome, Roman pilgrim"
"supplanter, one who follows at the heel"
"slender one"
"rocky land, gray land"
"from the estate of the fighter"
"the winter season, wet season"
"of the birds, bird-like"
"from the hazel trees"
"beloved of the sea"
"guardian of prosperity"
"son of Roderick"
"wolf-desire, wolf's help"
Similar sound: These names share phonetic patterns with Syre — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Old Norse/Germanic origins, giving them the same cultural heritage as Syre.
Rhythm: Syre is a 1-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.