Title: Baca (surname)
Content: Baca family of New Mexico ; Elfego Baca (1865–1945), American gunman, lawyer and politician ; Geovany Baca (born 1971), Honduran boxer ; Jimmy Santiago Baca (born 1952), American poet and writer ; Joe Baca (born 1947), American politician ; Joe Baca, Jr. (born 1969), American politician ; Lee Baca (born 1942), American sheriff ; Polly Baca (born 1941), American politician ; Rafael Baca (born 1989), Mexican footballer ; Susana Baca (born 1944), Peruvian singer Baca is a Spanish surname. Notable people with the surname include: 
Title: Bacca (surname)
Content: Ademir Antonio Bacca, Brazilian writer ; Carlos Bacca (b. 1986), Colombian football player ; Estefanía Bacca, Argentine vedette ; Juan David García Bacca (1901 - 1992), Spanish-Venezuelan philosopher ; Pippa Bacca (1974 – 2008), Italian feminist artist ; Sonia Bacca, Italian physicist Bacca is a surname. Notable people with the surname include: 
Title: Bač, Serbia
Content:  probably derived from the same personal name. In Serbian this name is written as Bač (Бач), in Hungarian as Bács, and in Romanian as Baci, although the Romanian population used this word as a title rather than as a name. The name is of uncertain origin and its existence was recorded among Vlachs, Slavs and Hungarians in the Middle Ages. The origin of the name could be Paleo-Balkanic, Romanian, Slavic, or Old Turkic. In the Romanian, Baci means "tenant, mountaineer or chieftain of the shepherd habitation in the mountain". The name could be spread into other languages by the Vlach shepherds. However, a similar name, Bača, was recorded among old Russians, which implies the possibility of Slavic origin. Hungarian linguists claim that a 
Title: Bacău
Content:  The town's name, which features in Old Church Slavonic documents as Bako, Bakova or Bakovia, comes most probably from a personal name. Men bearing the name Bakó or Bako are documented in medieval Transylvania and in 15th-century Bulgaria, but according to Victor Spinei the name itself is of Turkic – most probably of Cuman or Pecheneg – origin. Nicolae Iorga believes that the city's name is of Hungarian origin (as Adjud and Sascut). Another theory suggests that the town's name has a Slavic origin, pointing to the Proto-Slavic word byk, meaning "ox" or "bull", the region being very suitable for raising cattle; the term, rendered into Romanian alphabet as bâc, was probably the origin of Bâcău. In German it is known as Bakau, in Hungarian as Bákó and in Turkish as Baka.
Title: Bač (name)
Content:  One theory about language of the name claim that name Bač is of Slavic language, which could be confirmed by the fact that a similar name, Bača, was recorded among old Russians. In the territory of former Yugoslavia, several similar personal names are recorded among South Slavs too - Bača, Bačeta, Bačić, Bačko, Bačun, etc. By the opinion of Milica Grković, the name Bač is of Paleo-Balkanic language. Another theory implies possible Romanian language of the name. In the Romanian language, baci (pronounced the same way as Bač) means "tenant, mountaineer or chieftain of the shepherd habitation in the mountain". The name could be spread into other languages by the Vlach shepherds.
Title: Bačka
Content:  According to Serbian historians, Bačka is a typical Slavic name form, created from "Bač" (name of historical town in Bačka) and suffix "ka" (which designates "the land that belongs to Bač"). The name of "Bač" (Bács) town is of uncertain origin and its existence was recorded among Vlachs, Slavs and Hungarians in the Middle Ages. The origin of the name could be Paleo-Balkanic, Romanian, Slavic, or Old Turkic. According to Hungarian historians, the denominator of the landscape may have been the first bailiff of Bač (Bács) castle, and the name one which can be rendered probable it Old Turkic baya derives from a dignity name. In the 17th and 18th century, due to the large number of Serbs who lived in Bačka, this region was called »Raczorszag« (Hungarian for "the Serb country"). Sometimes, the Hungarians used name Délvidék ("the southern or lower country") for a wider imprecisely defined geographical area, which, according to 19th century view also included Bačka. However, according to other Hungarian sources, Bačka was rather seen as part of Alföld.
Title: Bácskai
Content:  Bácskai or Bácskay is a Hungarian habitational surname originally used for a person stemming from the historical region of Bačka (Bácska), which today is divided between Serbia and Hungary. It may refer to:
Title: Bač (name)
Content:  Bač (Бач), pronounced in English as Bach, was a historical Slavic personal name whose existence was documented in the Middle Ages. It is not certain whether the language of this name is Slavic, Paleo-Balkanic or Romanian.
Title: Bač, Serbia
Content:  but originally different Hungarian personal name was derived from the Old Turkic baya dignity in the form Bácsa, which later evolved into Bács. It is not certain whether name of the town came from Vlach-Slavic or from the Hungarian name. Some Hungarian historians assume that the town was named after the first comes of the county, Bács ispán (Bač župan). However, the existence of that person is not historically confirmed and his ethnic origin is uncertain. There are several more places with same name (in North Macedonia, Slovenia, Montenegro and Albania), as well as a large number of place names beginning with letters "bač-" or "bács-" that are scattered all over the Balkans and Central Europe, as well as in some other regions.
Title: Bács (given name)
Content:  Hungarian linguists claim that the word was derivation from the Old Turkic baya dignitary. Its languageal form was Bácsa, written as Bacha. A similar word meaning chief of the shephards was borrowed from Paleo-Balkanic, Romanian, or Slavic languages. The sounding of the two words became the same as the last "a" was dropped from the personal name. Hungarian authors claim that most Hungarian place names, for example Bácsa in Transdanubia, Hungary, weren't derivation from the Slavic-Vlach expression but from the personal name with a different language.

Question: where does the last name baca come from?
Answer: New Mexico.