Be that as it may, from Google; Freon (/ˈfriːɒn/ FREE-on) is a registered trademark of the Chemours Company and generic descriptor for a number of halocarbon products.
Two problems - one, that's not from google, that's actually Wikipedia's info, which is the first result that a google search typically will provide.
Second, as generic descriptor for halocarbon products (CFC's), neither R-134 a or R1234yf are halocarbon products. Both are in different product families. (Specifically R-134a is a hydrofluorocarbon (HFC), and R1234yf is a Hydrofluoroolefin (HFO).