Genuine, honest, or free from pretense
Cinsere is a modern phonetic spelling of the English word 'sincere'. It reflects a contemporary trend of turning virtuous character traits into unique personal names by altering traditional orthography.
Less common today
Cinsere isn't in the latest US Top 1000. It last peaked at #7,487 in 2019.
US births per 5-year period, 1990βpresent (SSA data).