Globally, Lambertha (Lambertha 
) is a rare feminine first name. The first name Lambertha is habitual in Tanzania, where it is a very rare female name, Mexico, and South Africa. Measured by absolute frequency, it most frequently occurs in Tanzania, Indonesia, and Mexico. Very seldom, Lambertha is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Lambertha | Indonesia, South Africa, Mexico, Tanzania, Netherlands |
| lambertha nieuwkamp Dutch Righteous Among the Nations, NL (b. 1916) |
|