Florida Statutes 2.01 provides:
  Common law and certain statutes declared in force.—The common and statute laws of England which are of a general and not a local nature, with the exception hereinafter mentioned, down to the 4th day of July, 1776, are declared to be of force in this state; provided, the said statutes and common law be not inconsistent with the Constitution and laws of the United States and the acts of the Legislature of this state.

Isom v. CIR. COURT OF TENTH JUDICIAL CIR., 437 So. 2d 732 - Fla: Dist. Court of Appeals, 2nd Dist. 1983 states:
At common law a person could adopt another name at will, absent a fraudulent, criminal, or wrongful purpose. Moskowitz v. Moskowitz, 118 N.H. 199, 385 A.2d 120 (1978). The codification of this common law right was intended primarily to aid the individual's right to a name change at will, giving the advantage of a public record to document the change. 57 Am.Jur.2d Name § 11; In re Application of Knight, 36 Colo. App. 187, 537 P.2d 1085 (1975); 79 A.L.R.3d 559. In keeping with the common law tradition, in Florida a person may adopt a name other than his or her own as long as no fraudulent or wrongful purposes are involved. See Adoption of Long, 56 So.2d 450 (Fla. 1952).

Affidavit