The star that Earth orbits is the only star that we call the sun. That said, if you lived on a planet orbiting another star, you would probably call that star the sun.
the sun
Earth's star is what we call the Sun, and it is a main-sequence star with a G2 spectrum and an absolute magnitude of +4.7.
Star system with 2 star called? binary star system
Sometimes it's called the "morning star" or the "evening star".
Darren Star's birth name is Darren Bennett Star.
Priscilla Star's birth name is Priscilla Star Diaz.
Star Yoo's birth name is Star Byol Yoo.
Star Edwards's birth name is Edwards, Laurie.
Chloe Star's birth name is Michelle Quintana.
Janusz Star's birth name is Jan Strahler.
Jessi Star's birth name is Jessica Snell.
Judy Star's birth name is Julie Davis.
Shelby Star's birth name is Stacy McLendon.
Shooting Star's birth name is Heminger, Louis.
Star Querubin's birth name is Estrella Querubin.
Monika Star's birth name is Isa Meskanen.