I did a little research on my own, and came to two startling conclusions.
This is a 12 point comparison between the physical features of Nads and Benjamin Franklin. The 12 point comparison is used by intelligence and law enforcement to make a preliminary identification of an individual based on photographs:

1. Forehead- actually, a fivehead going on six.
2. Hair- identical in color, thinness, length, and flaccidity.
3. Eyes- identically bleary. Ben's, from all night parties of wine and opium at the Hellfire Club; Nads, from being Nads.
4. Nose- identical shape and bomb crater sized nostrils.
5. Mouth- pursed lips to conceal bad dentition.
6. Jowl- a sign of wealth in the 18th century. Today, not so much.
7. Chin- weak, rounded, blends into jowls.
8. Second Chin- in case the first one wears out.
9. Shoulder- rounded, stooped.
10. Bosom- unappealing in a man or a woman.
11. Batwing- reportedly capable of allowing Nads to glide for short distances. No reports exist of Ben Franklin gliding.
12. Abdomen, or "paunch"- also a sign of prosperity 250 years ago which has not survived to the 21st century.
CONCLUSIONS:
1. Nadin Brzezinski Abbott is actually Benjamin Franklin, Founding Father.
2. Nadin Brzezinski Abbott/Benjamin Franklin is a 300 year old vampire, which accounts for all of her tales of derring-do. She claims to be a combat veteran, but will not name the war she fought in. I suspect it was the Texas War of Independence, which explains her proficiency with a Bowie knife.
SOURCES:
1) Multiple viewings of the
Highlander movie series
2) FlippyDoo's groundbreaking work on Nads throughout history
3) Half a bottle of Mexican cough syrup with a tequila chaser