Context: Eric P. Hamp in his 2012 Indo-European family tree, groups the Armenian language along with Greek and Ancient Macedonian ("Helleno-Macedonian") in the Pontic Indo-European (also called Helleno-Armenian) subgroup. In Hamp's view the homeland of this subgroup is the northeast coast of the Black Sea and its hinterlands. He assumes that they migrated from there southeast through the Caucasus with the Armenians remaining after Batumi while the pre-Greeks proceeded westwards along the southern coast of the Black Sea.

Question: What languages does Hamp say are similar to Armenian?
Answer: Greek and Ancient Macedonian

Question: What subgroup does Hamp put the Armenian language in?
Answer: Pontic Indo-European

Question: Where does Hamp say the Pontic Indo-European languages originate?
Answer: the northeast coast of the Black Sea and its hinterlands

Question: What languages does Caucasus think are similar to Batumi?
Answer: Unanswerable

Question: Into what language subgroup is Batumi categorized?
Answer: Unanswerable

Question: Where do Batumi languages originate?
Answer: Unanswerable

Question: Where is it thought the Batumi migrated?
Answer: Unanswerable

Question: In what year did Caucasus develop his Indo-Eurpoean family tree?
Answer: Unanswerable