Gerrilyn is of American origin, derived from Geraldine, which itself is an Anglo-Saxon name meaning "spear ruler." It was popularized during the Victorian era when many names were adapted and softened for female use. The variant spelling Gerrilynn also exists but is less common than Gerrilyn. This unique name brings a touch of elegance and charm to those who bear it, standing out as distinctive yet approachable.
Gerrilyn was quite popular among parents in the late 1950s and throughout the 1960s and again in the mid-1970s, with a notable spike in usage during those periods. The name saw a slight decline in popularity after the 1970s but still managed to have five instances of birth recorded in 1986. Overall, Gerrilyn was chosen for a total of thirty-two births between 1958 and 1986.