Melbourne Zoo's adorable pair of baby red pandas now have names.

The Zoo's keepers christened them on Wednesday, but only after a medical checkup confirmed that they were both, in fact, boys.

The first lad is called Mandu, short for Kathmandu, one of the places where the highly endangered species is found in the world. He hit the scales at 853 grams.

His brother is Keta, boy in Nepalese. The smaller of the pair weighs only 815 grams. Keepers say both are healthy for their ages.