The below ad mentions brothers S.P. Venkanna Babu and S.P.Kodanda Pani as the Production Executive and Music Directors of “Pandanti Kapuram” (1972) produced by Ghattamaneni Brothers. This could be the first instance where two sets of siblings worked for a Telugu Film. The only other siblings that come to my mind who could have jointly worked in few movies are K.Raghavendra Rao and his younger brother K.S.Prakash. The latter worked as a Cinematographer for some of the movies directed by his elder brother and produced by Mohan Babu. It can be recalled that Mohan Babu’s younger brother Manchu Krishna used to function as the executive producer for several films made on “Lakshmi Prasanna Pictures”.