Boris Lapin's birth name is Lapin, Boris Matveyevich.
Ron Lapin died in 1995.
boris I do not believe Caillou's last name is Boris because Boris is his dad's name. Therefore, while not unheard of, his dad's name would be Boris Boris and his mom's married name would be Doris Boris. I am thinking this is not the case. I do not believe Caillou's last name has ever been mentioned (at least not on the tv series).
Boris Carloff
Nino Bellini's birth name is Giovanni Bellin.
He is African American, his name is Boris Kodjoe.
Nicole Lapin's birth name is Nicole Miriam Lapin.
Boris Lapin was born on July 16, 1905, in Moscow, Russian Empire [now Russia].
Boris Lapin died in September 1941, in Kiev, Ukrainian SSR, USSR [now Ukraine] of WWII casualty.
Boris Sarbek's birth name is Boris Saberkoff.
Boris Kashev's birth name is Boris Kashev.
Boris Novak's birth name is Boris Novak.
Boris Tumarin's birth name is Boris Tumarinson.
Boris Kabur's birth name is Boris Bargunov.
Boris Makaseyev's birth name is Boris Konstantinovich Makaseyev.
Boris Leonidov's birth name is Leonidov, Boris Leonidovich.
Boris Lipatov's birth name is Lipatov, Boris Viktorovich.
Boris Livanov's birth name is Livanov, Boris Nikolayevich.