Using the inscriptional evidence, we get:

freyrekr (freyríkr) : freyguþr (gunn) : freygeirr : freygerþr :
freygeirr : freysteinn : freybiorn : freymundr : freylaug

fryguþr and fraygunn are insribed, showing the nnr>þr tendency, and
susequent loss of -r, most typical in West Norse. rekr is just an
unstressed West Norse ríkr. freybiorn alone occurs in West Norse
inscription, the others all East in this case.

Using saga-lierature, we get:

freyviþr : freygerþr : freysteinn : freydís

2 of the same, 2 different.

Using pre-reformation non-saga sources, we add:

freyketill (freykell) : freygarþr : freygeirr : *freyhvatr :
freybiorg/borg : freymundr : freymarr : freyleikr

OS (frøborg, Uppsala 1312), etc. *freyhvatr OS (frøvat Linköping
1343-5) is lacking expected -h/k-, but is probably solid - still,
the meaning is perhaps a bit odd, but there is *þórhvatr (Oslo and
Valdres 1329-1422, þoruater, -vats and Thorwatus OS/Lat. 1312).
Additionally, *freygnýr is likley (OS frøgny), but the meaning is
perhaps odd, given ON þórgnýr (a logical name, as he thunders).
freygarþr only occurs in legend, apparently, but is logical in view
of freygerþr þórgerþr/þórgarþr, etc..

Combining our sources, we get:

freyviþr : freyrekr : freyketill/kell : freyguþr/gunn : *freygnýr :
freygarþr : freygerþr : freygeirr : *freyhvatr : freysteinn :
freydís : freybiorg/borg : freybiorn : freymundr : freymarr :
freylaug : freyleikr

15 plus 2 likely. I'd add one solid reconstruction, *freyleif, as
feminines are less well attested, but I have no *freyleifr, which
somewhat surprises me - so 15 plus 2 for now.

-K