Other possible choices are Reporters Without Borders, Angela Merkel and the World Health Organization, experts said, though it is unclear whether they are nominated.
Nominations are secret for 50 years but those who nominate can choose to publicize their choices.
Thousands of people are eligible to nominate, including members of parliaments and governments, university professors, and past laureates.
It is not known whether Donald Trump is nominated for this year's prize, though he is up for next year's award after a Norwegian lawmaker named the US President for helping broker a deal between Israel and the United Arab Emirates.
Read also: Norwegian Right-Wing Politician Behind Trump Nobel Peace Prize Nomination
He is unlikely to win, Sveen and Smith agreed, not least for his dismantling of the international treaties to limit the proliferation of nuclear weapons, a cause dear to Nobel committees.
"He is divisive and seems to not take a clear stance against the violence the right-wing perpetrates in the US," said Smith.
"And that is just the first list."
(Writer: Gwladys Fouche | Editor: Angus MacSwan)
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