for the first time i guess the english and the portugese had to pool in their resources to try to defeat him. and failed
there is a story that he was the first to annex andamans for india
but I think it is rather farfetched.
Kanhoji's harassment of British commercial interests was extreme and hence they called him a pirate
some more info
The Western Naval command of the Indian Navy was named INS Angre on September 15, 1951 in honour of the valiant sea commander. A statue of him exists at the old Bombay Castle located within the enclave located at the Naval Dockyard, South Mumbai.
The old Kennery Lighthouse, on Khanderi Island which marks the southern boundary of the Mumbai Port, was renamed as Kanhoji Angre Light House