Hello Cesare,
Nice pieces
I don't know much about these weapons but always thought they were earlier (9th to 13th century).
Sadly, I don't know the english term either. The german term for this kind of weapon is "Flügellanze" which would translate to "winged lance" or "winged spear". I hope this helps finding further references.
There seems to be an "overview" paper (in german
):
Peter Paulsen, Flügellanzen. Zum archäologischen Horizont der Wiener ,sancta lancea´ [FMSt 3, 1969, pp. 289-312]
Best Regards,
Thilo