Wehrlite with formula Bi2+x Te3-x was first found in Hungary. The name was changed to pilsenite in 1982 with the formula being changed to Bi 4Te3, and tsumoite was found within the compositional range of former wehrlite. Nevertheless, some researchers have still taken the composition of wehrlite as that of pilsenite or taken tsumoite as pilsenite. This paper aims at reminding the researchers not to use the incorrect names.