The IUPAC name of the complex [Ag(H2O)2] [Ag(CN)2] is diaquasilver (I) dicyanidoargentate (I).
Explanation:
[Ag(H2O)2]: Silver (I) coordinated with two water molecules, called diaqua.
[Ag(CN)2]: Silver (I) coordinated with two cyanide ions, called dicyanido.
Silver (I) and Argentate (I) both indicate the oxidation state of silver is +1 in both parts of the complex.
Thus, the full name is Diaquasilver(I) dicyanidoargentate(I).
