i am

un·known

/ˌənˈnōn/

adjective

1. not known or familiar. 

"she has an unknown mind"

synonyms: uncertain, secret, strange, hidden

stran·ger

/ˈstrānjər/

noun

1. a person whom one does not know or with whom one is not familiar.

"don't talk to strangers"

synonyms: newcomer, outsider, visitor