Syncere sits next to 4 phonetic neighbors — Sincere, Sinclair, and Sentell are the closest matches by sound. Most share Syncere's Latin sincerus-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"genuine, authentic, honest"
"Zion variant, promised land"
"narrow, a strait"
"he who holds firm the good"
"helpful one"
"son of the army ruler"
"brave counsel"
"divine presence"
"descendant of Braonán, tearful one"
"son of Nicholas, son of Nick"
"lawful, true to one's pledges"
"strong, upright"
"son of Harry"
"bright settlement, day town"
"Yahweh has shown favor"
"cart maker, transporter"
"strong, mighty"
"village of the cross, farm by the cross"
"fragrant, sweet-smelling"
"all wise (from Norse Alviss)"
"companion, fellow traveler"
Similar sound: These names share phonetic patterns with Syncere — 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 Syncere.
Rhythm: Syncere is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.