The Anatolian languages, like Hitti and Luwian, are Indo-European and so is the Indo-Aryan and Indo-Iranian languages as well. The same can be said about Armenian and most of the European languages.
Urartian is believed to be either some form of IE, or a language isolate only related to Hurrian, the latter theory is the most accepted one. The IE languages are related languages so at some point they must have had a single source. The Semitic languages had a different source it seems.
Semitic languages develop around in Syria 3750 BC, while the Indo-European, which seem to be older develop in the Armenian Highland or the Northern Caucasus. The Indo-European culture, born in the Armenian Highland , seems to have spread to all directions.
Hurri-Urartian, or Armenian, seem to be the proignitor of the Indo-European languages. There is similarities between Semitic and Indo-European, but they are too distant from eeach other to be seen as comming from one language family.
The earliest testimony of Armenian dates to the 5th century AD (the Bible translation of Mesrob Mashtots). The earlier history of the language is unclear and the subject of much speculation. It is clear that Armenian is an Indo-European language, but its development is opaque. In any case, Armenian has many layers of loanwords and shows traces of long language contact with Hurro-Urartian, Greek and Indo-Iranian.
The large percentage of loans from Iranian languages initially led linguists to erroneously classify Armenian as an Iranian language. The distinctness of Armenian was only recognized when Hübschmann (1875) used the comparative method to distinguish two layers of Iranian loans from the older Armenian vocabulary.
W. M. Austin (1942) concluded that there was an early contact between Armenian and Anatolian languages, based on what he considered common archaisms, such as the lack of a feminine and the absence of inherited long vowels.
However, unlike shared innovations (or synapomorphies), the common retention of archaisms (or symplesiomorphy) is not necessarily considered evidence of a period of common isolated development.
Soviet linguist Igor Diakonov (1985) noted the presence in Old Armenian of what he calls a Caucasian substratum, identified by earlier scholars, consisting of loans from the Kartvelian and Northeast Caucasian languages such as Udi.
Noting that the Hurro-Urartian peoples inhabited the Armenian homeland in the second millennium b.c., Diakonov identifies in Armenian a Hurro-Urartian substratum of social, cultural, and animal and plant terms.
Some of the terms he gives admittedly have an Akkadian or Sumerian provenance, but he suggests they were borrowed through Hurrian or Urartian.
Given that these borrowings do not undergo sound changes characteristic of the development of Armenian from Proto-Indo-European, he dates their borrowing to a time before the written record but after the Proto-Armenian language stage.
The Anatolian branch is generally considered the earliest to split from the Proto-Indo-European language, from a stage referred to either as Indo-Hittite or “Middle PIE”; typically a date in the mid-4th millennium BC is assumed.
Armeno-Phrygian is a term for a hypothetical people who are thought to have lived in the Armenian Highland as a group and then have separated to form the Phrygians and the Mushki of Cappadocia. It is also used for the language they are assumed to have spoken.
It can also be used for a language branch including these languages, a branch of the Indo-European family or a sub-branch of the proposed Graeco-Armeno-Aryan or Armeno-Aryan branch. Classification is difficult because little is known of Phrygian and virtually nothing of Mushki, while Proto-Armenian arguably forms a subgroup with Greek, and Indo-Iranian.
The Armenian hypothesis of the Proto-Indo-European Urheimat, based on the Glottalic theory suggests that the Proto-Indo-European language was spoken during the 4th millennium BC in the Armenian Highland. It is an Indo-Hittite model and does not include the Anatolian languages in its scenario.
The phonological peculiarities proposed in the Glottalic theory would be best preserved in the Armenian language and the Germanic languages, the former assuming the role of the dialect which remained in situ, implied to be particularly archaic in spite of its late attestation.
The Proto-Greek language would be practically equivalent to Mycenaean Greek and date to the 17th century BC, closely associating Greek migration to Greece with the Indo-Aryan migration to India at about the same time (viz., Indo-European expansion at the transition to the Late Bronze Age, including the possibility of Indo-European Kassites).
The Armenian hypothesis argues for the latest possible date of Proto-Indo-European (sans Anatolian), roughly a millennium later than the mainstream Kurgan hypothesis. In this, it figures as an opposite to the Anatolian hypothesis, in spite of the geographical proximity of the respective suggested Urheimaten, diverging from the timeframe suggested there by as much as three millennia.
Graeco-Aryan (or Graeco-Armeno-Aryan) is a hypothetical clade within the Indo-European family, ancestral to the Greek language, the Armenian language, and the Indo-Iranian languages.
Graeco-Aryan unity would have become divided into Proto-Greek and Proto-Indo-Iranian by the mid 3rd millennium BC. Conceivably, Proto-Armenian would have been located between Proto-Greek and Proto-Indo-Iranian, consistent with the fact that Armenian shares certain features only with Indo-Iranian (the satem change) but others only with Greek (s > h).
Graeco-Armeno-Aryan has comparatively wide support among Indo-Europeanists for the Indo-European Homeland to be located in the Armenian Highland. Early and strong evidence was given by Euler’s 1979 examination on shared features in Greek and Sanskrit nominal flection.
Used in tandem with the Graeco-Armeno-Aryan hypothesis, the Armenian language would also be included under the label Aryano- greco-Armenic, splitting into proto-Greek/Phrygian and “Armeno Aryan” (ancestor of Armenian and Indo-Iranian).
In the context of the Kurgan hypothesis, Greco-Aryan is also known as “Late PIE” or “Late Indo-European” (LIE), suggesting that Greco-Aryan forms a dialect group which corresponds to the latest stage of linguistic unity in the Indo-European homeland in the early part of the 3rd millennium BC. By 2500 BC, Proto-Greek and Proto- Indo-Iranian had separated, moving westward and eastward from the Pontic Steppe, respectively.
If Graeco-Aryan is a valid group, Grassmann’s law may have a common origin in Greek and Sanskrit. Note, however, that Grassmann’s law in Greek postdates certain sound changes that happened only in Greek and not Sanskrit, which suggests that it cannot strictly be an inheritance from a common Graeco-Aryan stage. Rather, it is more likely an areal feature that spread across a then-contiguous Graeco-Aryan-speaking area after early Proto-Greek and Proto-Indo-Iranian had developed into separate dialects but before they ceased being in geographic contact.