Page "Dubnium" Paragraph 12

The Soviet ( later, Russian ) team proposed the name nielsbohrium ( Ns ) in honor of the Danish nuclear physicist Niels Bohr.

The American team proposed that the new element should be named hahnium ( Ha ), in honor of the late German chemist Otto Hahn.

Consequently hahnium was the name that most American and Western European scientists used and appears in many papers published at the time, and nielsbohrium was used in the Soviet Union and Eastern Bloc countries.