Just on the form I'd guess a romance descendant of a personal name cognate with or derived from Moesogothic Liufharjis or Liubawari (medial b was pronounced similarly to f or v), Gothic or Lombard could have supplied the original if Italian, Suebian, Vandal, Ostrogothic etc. if Spanish (the h and w are regularly syncopated in such names). The two names mean respectively beloved+army and beloved+defender (in such names the two elements have separate, not combined, significance). Versions of both names are recorded elsewhere e.g. Leuparius, Liupwar.