Keitha is of Scottish origin, derived from the name 'Keith', which was originally an occupational surname for a cowherd. The name has gained popularity as a given name in recent times, particularly among English-speaking countries such as the United States and Australia. It typically bears the feminine suffix '-a'.
The name Keitha experienced fluctuations in popularity over the course of these years, with peaks in the late 40s and mid-50s, but it has since declined significantly, with only single-digit births recorded from the mid-80s onwards.