"I'm (a) stranger to you all" and "I'm unknown to you all" are English equivalents of the Italian phrase Sono sconosciuto a voi. The speaker is a male since the adjective/noun/past participle has the masculine singular ending -o. The pronunciation will be "SO-no SKO-no-SHOO-to a voy" in Italian.
"Fortunate I am!" in English is Sono fortunato! in Italian.
Sono tuo in Italian means "I'm yours" in English.
Sono bella! in Italian means "I'm beautiful!" in English.
Sono innamorata! in Italian means "I'm in love!" in English.
"Am" in English means (Io) sono in Italian.
Sono le sette in Italian means "They are the seven" in English.
Vi sono sorprendenti! in Italian means "You are amazing!" in English.
"I agree!" in English is Sono d'accordo! in Italian.
"I am happy!" in English is Sono felice! in Italian.
"I am envious!" in English is Sono invidioso! in Italian.
"I am not Italian!" in English is Io non sono italiano!in Italian.
Dove sono le scarpe? in Italian is "Where are the shoes?" in English.