That's not necessarily the same guy. "Parthasarathi Majumder" is like John Smith in India. (j/k)
I believe that a big wig San Diegan Indian-American, community leader in the forefront (Parthasarathi Majumder) is one and the same as our Parthasarathi Majumder who is also San Diegan Indian American donator to Senators and Congressman, and NRI community leader. If it were "Anil Gupta" in Nebraska being confused with "Anil Gupta" in Seattle, on the other hand, I can imagine the mixup.