Indira Gandhi was Nehru's daughter. Corazon Aquino was the widow of Senator Benigno Aquino. Benazir Bhutto is the daughter of Zulfikar Ali Bhutto, former prime minister. Isabel Peron was the widow of Juan Peron.
Golda Meir and Margaret Thatcher had no family ties to other politicians, so far as I know.
But it seems many female politicians do.