This is a way to get a family Name in Python from a Family Type via an Element Collector.
import System
import clr
clr.AddReference('RevitAPI')
from Autodesk.Revit.DB import *
clr.AddReference("RevitServices")
import RevitServices
from RevitServices.Persistence import DocumentManager
doc = DocumentManager.Instance.CurrentDBDocument
cats = IN[0]
fam = []
fec = FilteredElementCollector(doc).OfCategory(BuiltInCategory.OST_StructuralFraming).WhereElementIsElementType().ToElements()
for i in fec:
fam.append(i.FamilyName)
OUT = fec, fam