Pollyanna is the title of a novel by Eleanor Porter. There was also a film version. The novel's success brought the term "Pollyanna" (along with the adjective "pollyannaish" and the noun "Pollyannaism") into the language to describe someone who seems always to be able to find something to be "glad" about no matter what circumstances arise. It is sometimes used to refer to someone whose optimism is excessive to the point of naïveté or refusing to accept the facts of an unfortunate situation. The word "pollyanna" may also denote a holiday gift exchange more typically known as Secret Santa. This term is used in Philadelphia in America and the surrounding areas of Pennsylvania. It can instead mean a gift exchange rotation in which several families each give gifts to one other family in the "pollyanna" each year. This is often done when siblings in a large family begin to have children of their own. [Source: Wikipedia]

= excesively or blindly optimistic person. Sorry for spelling Dictionary.com

Pollyanna (noun) - a person characterized by irrepressible optimism and a tendency to find good in everything. EX: I'm no Pollyanna, but I do think some good will come out of this. Pollyannaish also Pollyannish (adjective to describe that kind of person) Merriam-Webster Dictionary