The names for the chemical elements 104 to 109 were the subject of a major controversy starting in the 1960s which was finally resolved in 1997.
Rutherfordium was a proposed name for element 104, then for element 106 with the symbol Rt, and was finally accepted for element 104, with the symbol Rf.
Generally accepted name for element 106 is seaborgium (Sg).

http://en.wikipedia.org/wiki/Element_naming_controversy
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