Suk Quartet (Founded 1968 by members of Czech Philharmonic)

line-ups

--- at least in 2003
Ivan Štraus - 1st violin
Ludvík Hašek - 2nd violin
Karel Řehák - viola
Jan Štros - violoncello

--- unknown dates
Ivan Štraus, Jan Štros, Karel Řehák, Vojtěch Jouza

--- at least 1976 - 1980
Antonín Novák - 1st violin
Vojtěch Jouza - 2nd violin
Karel Řehák - viola
Jan Štros - violoncello
(Lubomír Malý - 2nd viola 1976 - 1978)
(Karel Špelina - 2nd viola 1976)

There was also Sukovo kvarteto (Suk Quartet) founded by Josef Beran (1896-08-18 - 1978-03-08) it existed between 1929 and 1949.

There was also a quartet with Josef Suk as a member. This quartet was called České kvarteto / Bohemian Quartet / Czech Quartet and existed between 1891 and 1934.
http://en.wikipedia.org/wiki/Bohemian_Quartet