Cyncere sits next to 3 phonetic neighbors — Sincere, Sinclair, and Sinjin are the closest matches by sound. Most share Cyncere's Latin sincerus-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"sincere, genuine"
"payment, brow, forehead"
"determined guard, resolute protector"
"lion"
"from Dax, France"
"from Courtenay (place in France)"
"one who lisps or stammers"
"from Nimes (fabric origin)"
"coin, payment"
"of uncertain meaning, possibly healer"
"strength, power"
"moon, lunar brilliance"
"ease, wealth"
"vigilant in war (via Casey)"
"land of oaks"
"creative compound with Ja- prefix"
"of the Marco family"
"of royal lineage, kingly"
"God is gracious"
"from the British settlement"
"dog (loyal companion)"
Similar sound: These names share phonetic patterns with Cyncere — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Latin sincerus origins, giving them the same cultural heritage as Cyncere.
Rhythm: Cyncere is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.