I doubt there was much GROUP LINEAGE of protestant groups. INDIVIDUALS from a viable, valid, GODLY group likely reared at least some of their children in Godly ways regardless of the cultural circumstances. Eventually, such children would likely gather together with others of like precious faith.
Successive 'congregations' of such group types would ebb and flow with various levels of intimacy with God and one another and The Written Word, when available . . . as well as with the anointing and empowering, giftings of Holy Spirit.
GOD HAS ALWAYS HAD A REMNANT. And if Scripture is any clue, THE REMNANTS, HAVE TENDED TO BE PRESERVED
AT LEAST AS MUCH OUTSIDE CONVENTIONAL RELIGIOUS ORGANIZATIONAL STRUCTURES AS WITHIN--as with the 7,000 never bowed to baal group.
Organized groups have historically done a dreadful job of protecting THE FAITHFUL, THE FAITH AND/OR THE WORD.
GOD ALONE IS FAITHFUL. God alone is safe. Those seeking HIM FIRST AND FOREMOST are safest on all scores regardless of the culture and organizations around them.
Can you take your posters to some highway, please? You are among adults here. You've been asked many times.