Unexpected a. : Not expected; coming without warning; sudden.

Example:
What was the most Unexpected/unusual information source you've come across in your Genealogy hunt?

Taxonomy
dictionary, encyclopedia, pect, unforeseen, kt, thesaurus browser, online dictionary, arrival, synonyms, antonyms, Translations, Free Online Dictionary, appearance, unexpected death, ngờ, tendency, English dictionary, unexpectedness.

Defination from the web:
unexpected in the Online Dictionary. Meaning of unexpected. Pronunciation of unexpected. Translations of unexpected. unexpected synonyms, unexpected antonyms. ... they turn up in the most unexpected places aparecen en los lugares más insospechados ...