The Roman Martyrology is not the only official source. These are all listed in the Ruthenian Calendar.
Yes, I am well aware that the RM is not the only official source.
The above list of Orthodox saints which you posted comes from this blog
which titles it as "The following saints appear in the list of saints of the Roman calendar that the Servant of God Pope Paul VI approved in 1969:".
Since it was referring to the Roman liturgical calendar, I was pointing out that the source this blog uses is unofficial and only four of those listed are actually in the RM.
I just saw your correction about the Ruthenian calendar.
Yes, the Russian Catholic churches generally commemorate almost every saint glorified by the Russian Orthodox Church.
You state that many of them are also found in the Ruthenian calendar. I presume you are referring to the menaion of the Byzantine Catholic metropolia
. Yes, several of those listed can be found there.