Here is a good read from Hrach Martirosyan.
There is a table of correspondences btw Greek and Armenian alphabets. As one can note the Armenian k' correspond to Greek Chi X while the p' to the letter phi.
The only caveat that Greek didn't have any letter to note the x խ so they were forced to use the chi.
At the end You get Chaldea in Mesopotamia which is equal to Armenian K'aldea and You get Chaldes in Pontus whose real name was Xalti/Khalitu. Completely different tribes and names rendered in the same way in Greek.
Which creates confusion.