| 251. | IGNATIOS | From Greek name Ignatios which means "bright", "fiery". It is in use since XI c. The short form is Ignat; the corresponding surname is Igityan. |
| 252. | IGOR | From Russian name Igor. There is a version that this name comes from Scandinavian name Ingvarr. |
| 253. | ILARION | From Greek name Hilarion (hilaros "joyful"). |
| 254. | ILYA | From Russian name Ilya which comes from Iberian word elijah "sure", "strong". |
| 255. | ILYICH | Comes from the patronymic of Vladimir Ilyich Lenin. |
| 256. | IPPOLIT | From Greek hippos + litos which means "rider". It came by means of literature. |
| 257. | ISABEG(Isabek) | From Turkish name Isabeg, consisting of Isa "Jesus" and beg "prince". There is also the form Yasabeg (Yasabek). The corresponding surname is Isabegyan (Yasabegyan). |
| 258. | ISAHAK | From Hebrew name Isakhaq "fun", "mock", which comes from Bible and is still in use. The corresponding surname is Isahakyan. |
| 259. | ISHKHAN | From Armenian ishkhan "prince". The diminutive form is Ishkhanik; the corresponding surname is Ishkhanyan. |
| 260. | ISKANDAR | Is the Arabian form of the Greek name Alexandros (Persian Iskandar) which means "defender". We also have the surname Iskandaryan. |
