Iznogoud in Greek is ΙΖΝΟΓΚΟΥΝΤ. Some of the series was published in Greek originally by Anglo-Hellenic Agency in no particular order, and later Mamouth Comix reprinted the whole series numerically. See this site for details on Mamouth's editions. As to what the titles translate to exactly... no luck there, it's all Greek to me! Thanks to Dimitris Kiminas and Stelios for help on the Greek editions.

Iznogoud = ΙΖΝΟΓΚΟΥΝΤ
Servant = ?
Caliph = Xaroun el Poussax

1. (French title: Le Grand Vizir Iznogoud)

Original French publication date: 1966
Greek publication dates:
1978 (Anglo-Hellenic Agency)
May 1990 (Mamouth Comix)
1999 (Mamouth Comix)

2. (French title: Les Complots du Grand Vizir Iznogoud)

Original French publication date: 1967
Greek publication dates:
19?? (?)
July 1990 (Mamouth Comix)
1999 (Mamouth Comix)

3. (French title: Les Vacances du Calife)

Original French publication date: 1967
Greek publication dates:
1981 (Anglo-Hellenic Agency)
September 1990 (Mamouth Comix)
1999 (Mamouth Comix)

4. (French title: Des Astres pour Iznogoud)

Original French publication date: 1969
Greek publication dates:
19?? (?)
November 1990 (Mamouth Comix)
???? (Mamouth Comix)

5. (French title: Iznogoud l'Infame)

Original French publication date: 1969
Greek publication dates:
19?? (?)
January 1991 (Mamouth Comix)
2000 (Mamouth Comix)

6. (French title: Iznogoud et l'Ordinateur Magique)

Original French publication date: 1970
Greek publication dates:
19?? (?)
March 1991 (Mamouth Comix)
2000 (Mamouth Comix)