Iran is the Persian word for Aryan

A good example is the trilingual inscription of Ardashir (founder of Sassanid empire) in Naghsh-e Rustam:

Parthian: Patkar im mazdyazn bag Artaxshahr, Shahan Shah Aryan ke Chihr az yaztan puhr bag Papak Shah

Greek: [I don't know it but I think the first word in the third line is Aryan]

Persian: Patkar in mazdyasn bag Artaxshahr, Shahan shah Iran ke chihr hach yazdan pus bag Papak shah

Modern Persian: In [ast] peykar-e Mazdisan khoda Ardashir, Shahanshah-e Iran ke chehre-i [ast] az yazdan o pesar-e khoda Babak shah

English: This is the figure of the worshipper of Mazda the lord Ardashir, King of kings of Iran who is the face of the God and the son of the lord Babak the king

I think Iran and Iron are the same, some Iranian peoples such as Tajiks call our country "Iron".

sure; currently there are  about  66% of persians living in iran, primarily in tehran, isfahan, shiraz, kerman, kashan and mashad. The rest are in minorities, turkemens(on north-eastern) Azeri turks (north-western and tabriz), Kurds(mahabad=city near iraq with separate kurdish speakers) and some other people of previous nomadic descent living in iran called, Khuzestanis (iraq border), luris (central), Balouchis (pakistan border) and qashqai's (small minority in farming villages) there are also divisions within the iranian rank or aryan lineage such as persians, medes and parthians whose successive indigenous dynasties allowed irans culture to prevail.

LOL sounds like a generous-hosting region

What Kakheti and Kartli invasion? U mean Iranians' relocating Georgians?

Really interesting that it is trilingual, I guess he really wanted to get the message across to everybody

Ferdun is supposed according to available literature to have about ten thousand 'native' speakers.

Some interesting info on Georgia is as follows:

Persians in 17(51?) completely destroyed Tiflis. This arguably helped precipitate their move to the Russian federations protectorship whereupon they were forcibly annexed.

Georgias most famous piece of Poetic Literature is called the Knight and the Panther skin coat: tightly ordered verse on an epic scale it is widely regarded as a Persian style poem with strains of Mystical Sufism

Kakhetian Wine is world famous and the stuff of poems. Georgians are famed for Chivalrous behaviour and ecstatic intoxication-  very much the embodiment of Mystical Sufism and strong features of Sufi poetry.

Eastern Georgia is heavily influenced by Persian Culture. Architecture is simlilar to that of the streets of Tehran at the turn of the last Century. Ethnically many are brown skinned typically Iranian looking in the modern sense of the word and with the removal of name endings like -adze/-ashvili often reveal typically Muslim or Persian origins.