On his Sire's side (Dynaformer)
Man O' War shows up in the pedigree of Roberto (Barbaro's "grandfather") about 7 generations back.
On his Dam's side (La Ville Rouge)
Man O' War shows up in the pedigree of Carson City (Barbaro's other "grandfather") about 8 generations back.
He also shows up in the pedigree of La Reine Rouge (his "grandmother") about 9 generations back.
If anyone is interested, I used www.pedigreequery.com for the search, you can do free pedigree searches for up to 5 generations. So for what I did, it took a bit of time.
But from what I could find, Man O' War shows up 3 times in Barbaro's pedigree. If any of you decide to go to pedigreequery.com to do a search on his pedigree, you'll also see has has a few of "who's who" in his pedigree as well. Like Mr. Prospector and Mumtaz Mahal, just to name a few.