Irene Bruegel, founder and long-time secretary of the Jews for Justice for Palestinians group, died last Monday.
She had also served as chair of the British Shalom Salaam Trust.
JfJfP's executive committee said Ms Bruegel's "commitment and creativity" were central to the group's establishment and that a charitable fund would be set up in her memory.
Ms Bruegel had been diagnosed with a degenerative auto-immune liver disease for which the only treatment was a transplant, but she died after a preliminary operation.