Free man
Carlena is a feminine derivative of Charles, via the Germanic name Karl. It signifies a person who is free and not under the bond of a lord, though in modern contexts it is often associated with strength and independence.
Less common today
Carlena isn't in the latest US Top 1000. It last peaked at #4,251 in 1992.
US births per 5-year period, 1990βpresent (SSA data).