I think there may be propensity for multiple bearded birds in certain areas. The place I hunted in Hardeman County always had them. I killed one with 9 beards one morning. Congrats on yours.
We have killed several with multiple beards over the years including one with 5. We also have a lot of bearded hens on our place. A WO told me that the genetics of having the bearded hens helps the growth of the beards in the toms.