Former Chief Minister E K Nayanar's daugther and LDF candidate Usha Praveen suffered a defeat in the election to the city corporation.
The result gave the Congress-led UDF a decisive mandate to rule Kerala's bustling business hub.
Usha was defeated by her nearest Congress rival David Parambithara, son of former Kerala Assembly speaker Alexander Parambithara from the Ravipuram division.
During the campaign, Usha, a housewife, had said she has no political experience other than being related to the late Nayanar.
However, Sarada Mohan, daughter of another late CPI leader and former Chief Minister P K Vasudevan Nair, won from Kalady division of Ernakulam district Panchayat.