Free man
Carlei is a modern phonetic variant of Carly, which is a feminine diminutive of Charles. It ultimately derives from the Germanic word 'karl', referring to a free person who was not of noble birth but held legal rights.
Less common today
Carlei isn't in the latest US Top 1000. It last peaked at #7,712 in 2017.
US births per 5-year period, 1990βpresent (SSA data).