Get cuttings from your brothers fig and root them. You don't need the name to grow the same figs.

Rooting is really easy to do. I've had mine rooting for 3 weeks and they're leafing out. I have to baby them for another 3 and harden them off outside gradually in their new bigger pots. I've never grown figs before and was sent 10 different varieties from a friend who thought I should try.
Good luck getting dormant cuttings at this time.
Noogy

Rooting is a good idea...but I would also suggest doing an air layering. It's easy and has the potential to provide you with a good sized plant right off the bat instead of waiting for a cutting to become established.

I see you're in zone 7. I am in zone 9/10, and the varieties which do well in my microclimate (and thus, which tend to taste best when grown here) are semicoastal-adapted varieties that don't need high heat to ripen in summertime: Black Mission, Black Jack (purple with red/amber interiors), Peter's Honey (green/yellow with amber interior), Violette de Bordeaux (purple with red interior), and Lattarulla (green/yellow with pale amber interior).

That being said, I planted a variety 3 years ago which is supposed to need high heat, but it did very well anyway: Panache Tiger, a striped exterior with a red interior. It produced good fruits in all heat levels, but last year when we had exceptionally high temps, it was better than ever. OTOH, that same high heat wilted my Black Jack tree and its fruit was terrible.

Perhaps you could be more specific about what type of climate/temps you have, to get better recommendations.

just take your brothers as suggested above. Many people grow no name figs.

If your brother lives in CA, what part? if he lives in Souther CA, he may have a Smyrna type fig or Calimyrna type which needs a tiny wasp from a Caprifig for the fig to ripen. If you don't know, take some cuttings and try them. You will know for sure in 3-4 years. For me in east, TN , zone 7, Sals, Hardy Chicago, Celeste, Red & Green Italian, Patrick Super Giant all have been good producers. They are common figs, ( meaning no wasp needed). These same varieties do well in other parts of zone 7 also. CH.