One can easily use the historical record to affirm one's doctrinal positions. The EOC does a superlative job in that area IMO. The problem, of course, is that the historical record is not entirely consistent, as we have seen concerning the early debate concerning Mary's virginity. If you wish to support the Catholic position from the Church fathers then you are placed in a real quandary. As we have seen those Church fathers who stood fast on the issue of her virginity believed that Jesus was not born naturally but mysteriously emerged from the side of Mary. Those Church fathers who agreed with their predecessors in the faith and maintained that Jesus Christ was actually and really a physical human being who was born naturally, then accepted the fact that her hymen had been broken in the process of birth and she was no longer a virgin.
The dilemma of the Catholic church on this dogma is that if they accept the mysterious view of Christ's birth, they are, perforce, accepting that in that aspect He was not really and entirely a physical human being. This borders on Gnosticism, of course. If they accept the concept of a natural birth (which they do at present) then the definition of virginity has to be radically altered so that it is limited merely to having marital relations and nothing more. The ECF's who maintained the doctrine of perpetual virginity flatly denied this definition.
In any event, one certainly cannot say that the modern dogma of the PV of Mary can be found much earlier than the thirteenth century. As for the other titles applied to Mary, those are the topic of another thread or two.