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Dubnium is a radio active atom that was obtained by nuclear fusion techniques. It does not occur in nature.

What the name means: The Russian group named element # 105 nielsbohrium (Ns). However, the American group in Berkeley had named element # 105 hahnium (Ha) after the German scientist, Otto Hahn.
The International Union of Pure and Applied Chemistry (IUPAC)  temporarily named the new element Unnilpentium, with the symbol Unp. In 1997 the IUPAC settled the question by naming it dubnium, after the town near Moscow where the Joint Institute for Nuclear Research is situated .

Who made dubnium?: Georgy Nikolaevich Flerov and  co-workers at the Joint Institute for Nuclear Research in Dubna, Russia in 1968.

About dubnium: Dubnium was made by bombarding californium atoms with nitrogen nuclei. Only a few atoms of dubnium have ever been made. Dubnium atoms have a half life of 34 seconds.