Which Inca ruler was installed by the Spanish after Atahualpa's execution?

Túpac Huallpa was the Inca ruler installed by the Spanish after Atahualpa’s execution.

After Atahualpa was killed at Cajamarca in July 1533, Francisco Pizarro needed an Inca ruler who could lend legitimacy to Spanish operations. Túpac Huallpa, Atahualpa’s brother, was placed in that role as the Spanish advanced toward Cusco. His authority was largely dependent on Spanish military power and political backing.

Túpac Huallpa did not rule for long. He died at Jauja during the Spanish march, with some accounts blaming the Atahualpa loyalist commander Chalcuchima. The Spanish then backed Manco Inca Yupanqui, another son of Huayna Capac, who was crowned in late 1533.

A common mix-up is treating Manco Inca as the immediate successor to Atahualpa. Manco became the next major Spanish-supported Inca ruler, but Túpac Huallpa came first. Manco later turned against the conquistadors and led the siege of Cusco in 1536.