Eduard - From French name Edouard which means "property watcher", "watchman". It came by means of literature. The short forms are Edvard, Edik. Petrosyan - Petrosyan, Petrosian or Petrossian (Eastern Armenian), Bedrosian or Bedrossian (Western Armenian) is a common surname in Armenia.
It is a patronymic from the Armenian first name Petros (equivalent to Peter).