Former Israeli Prime Minister Ehud Olmert was sentenced on Monday to eight months in prison for unlawfully accepting money from a US supporter, capping the dramatic downfall of a man who only years earlier led the country and hoped to bring about a historic peace agreement with the Palestinians.

Olmert was convicted in March in a retrial at Jerusalem District Court. The sentencing comes in addition to a six-year prison sentence he received last year in a separate bribery conviction, ensuring the end of the former premier's political career.

Olmert's lawyer, Eyal Rozovsky, said Olmert's legal team was "very disappointed" by the ruling and would appeal to Israel's Supreme Court. They were granted a 45-day stay, meaning the former Israeli leader will avoid incarceration for now.

Olmert also was given a suspended sentence of an additional eight months and fined $25,000.

A slew of character witnesses had vouched for Olmert, including former British prime minister Tony Blair and former Israeli Mossad chief Meir Dagan in written statements read aloud on Monday. The verdict stated that it recognized Olmert's vast contributions to Israeli society and sentenced him to less than the prosecution had demanded. Still, it ruled that "a black flag hovers over his conduct".

Olmert was forced to resign in early 2009 amid the corruption allegations. His departure cleared the way for hard-liner Benjamin Netanyahu's election, and subsequent peace efforts have not succeeded.

Olmert, 69, was acquitted in 2012 of a series of charges that included accepting cash-stuffed envelopes from US businessman Morris Talansky when Olmert was mayor of Jerusalem and a Cabinet minister. Olmert was found to have received about $600,000 from Talansky, but a court did not find evidence the money had been used for unlawful personal reasons or illegal campaign financing.