Were ALL 1st century Christians called “saints” by saints Paul, Jude, John etc, as they addressed all believers reading their NT writings as ‘saints’

My Q is concerned purely with how the NT seems to address all 1st century Christians as “saints” even while they were living. Of course, it also addresses martyred saints e.g. in Revelation 6:9-11: “the souls of them that were slain for the word of God, and for the testimony which they held,” speaking from under Heaven’s altar. They must wait till the full number of their fellow-servants and brethren should be killed as had they. Revelation 20:4 also specifically mentions those who had been “beheaded for the witness of Jesus and for the word of God”, and that they had not received the mark of the beast”, therefore I am very happy to speak of martyred saints. My Q is about the NT use of the word translated “saints” when applied to living believers in the 1st century, and, by implication, to all believers thereafter. The Greek word in question is ‘hagios’ and I consulted the *Englishman’s Greek Concordance of the New Testament* (Bagster, London, 9th ed. 1903). I ascertained that there are some 58 times in the NT where believers are addressed as “saints”, the vast majority still being alive at time of writing. But modern translations seem to use other words, such as “holy ones”, or “God’s people” or “the believers”, as well as “the saints”. There seems to be no consistency in modern translations, whereas the A.V. and other older translations seem to stick consistently to “the saints”. For example, *Young’s Literal Translation,* 1898 (YLT) reads, “Paul, an apostle of Jesus Christ through the will of God, to all the saints who are in Ephesus, to the faithful in Christ Jesus… I also, having heard of your faith in the Lord Jesus, and the love to all the saints, do not cease giving thanks for you… the riches of the glory of His inheritance in the saints… ye are no more strangers and foreigners, but fellow-citizens of the saints…” (Ephesians 1:1, 15, 18 & 2:19). I ask about why other translations use words other than ‘saints’. Does the Greek ‘hagios’ lend itself to a variety of meanings when it applies to living people (as opposed to objects or things, such as Jerusalem or covenants)? I know that Catholics speak of “the Saints” (such as the Apostles) and wonder if their translations confine ‘hagios’ to them alone, in the Bible? I seek the views of Catholics as I have a fair idea of the Protestant view, but I am NOT looking for anything about Canon Law – I seek a purely scriptural explanation about the scriptures themselves.