More than 60 Brazilian members of congress from the opposition Workers' Party have formally changed their names.

They have added the name "Lula", after Luiz Inácio Lula da Silva was jailed last weekend.

The move, in tribute to the former president, was led by the head of the party, Gleisi Hoffmann.

She will now be known as Gleisi Lula Hoffmann in official Congress documents and on the electronic voting board.

The party's leader in the lower house, Paulo Pimenta, followed her example and is now called Paulo Lula Pimenta.

Party colleagues followed their lead in droves, but so did some legislators from right-wing parties.

They are adding Judge Sérgio Moro - who convicted Lula - to their names.

The former president began a 12-year sentence for corruption on Saturday.

Lula says the charges against him were politically motivated.