You're serious?
I was addressing the last part of your statement and should have clarified that. You wrote...or their Christian ancestors were never a part of the Roman Church.
Unless you are speaking of the Orthodox church after the Schism of 1054(?) your statement is not historically accurate.
No Protestant denomination which holds with orthodox Christian teaching such as the Divinity of Jesus, The Holy Trinity, that Christ is both fully God and fully man would want to claim some kind of relation with people who broke away from the early Church. They were by both their contemporary Church and modern Protestant definition heretics. They were Gnostics, Arians, Nestorians. They were not some hidden remnant that reemerged when the hammer pounded on that Wittenburg(sp)door.
If they have any descendants it is the Jehovah Witnesses, the Oneness Pentecostals, the Unitarians, the LDS and other sects which deny orthodox teachings about Jesus.