The Spanish name for Herbert is "Héctor." However, it's worth noting that "Herbert" is often used as is in Spanish-speaking contexts. The name can vary in usage depending on cultural influences and personal preferences.
It's quite likely Herbert Birdsfoot didn't appear on the Spanish dub of Sesame Street. If he did, he likely kept the same name.
President Herbert Hoover His full name is, Herbert Clark Hoover
Herbert Rubens's birth name is Herbert Rubenstein.
Herbert Rona's birth name is Herbert Rosenthal.
Herbert Plews's birth name is Plews, Herbert.
Herbert Tiede's birth name is Salomon, Herbert.
Herbert Waring's birth name is Herbert Rutty.
Herbert Ellis's birth name is Herbert Siegel.
Herbie Herbert's birth name is Walter Herbert.
Pitt Herbert's birth name is Herbert Eytorff.
Herbert Achternbusch's birth name is Herbert Schild.
Herbert Wise's birth name is Herbert Weisz.