A K Hangal Mystery!

The eternal grandfather of Bollywood.

Whenever Bollywood has a needed a sidey to essay the part of old man left to the sea, or an old man fighting for justice, or an old man there to mouth just one dialogue, or angry old man.. or well, just an old man, A. K. Hangal has been the savior of Bollywood! Now ever since my friend has mentioned about him in her tribute to A. K. Hangal, I and she have been immensly bothered by the 32 million question:

Exactly what does A and K stand for A. K. Hangal?!

Even Google has failed to answer this question. Do you know what is his full name? Does anyone know? Do you?