Irenaeus is a male name, which can be diminutive as Irek. It comes from the Greek language. It means "calm" or "peaceful" when translated. The equivalent of Irenaeus in the female form is the name that sounds like Irena. In French it is written as Irénée.
Igor is one of the masculine names that start with the letter I. It is believed that it comes from Scandinavia. Igor's name day is usually celebrated on June 5, on the day of the saint's memory of this name. Igor can be referred to as Igorek, Igi or Igorunio.