Found 2 boys and girls with the meaning of voluntary
Joab / 4 letters 
Meaning of Joab In Biblical, Joab means Paternity; voluntary More
Nadab / 5 letters 
Meaning of Nadab In Biblical, Nadab means Free and voluntary gift; prince More

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kynankynyrl'isle
labanlaborlabours
lachlanladderlafayette
lakeslakesidelamentation
lamentationslampslancaster
lancelance!lancelot
lancerland-ownerlanded