The name Gumaro is of Spanish origin and is derived from the Germanic name Gummar, which itself comes from the elements "guma" meaning "man" and "mari" meaning "famous" or "celebrated". The name can be traced back to the Medieval period in Spain, particularly in regions such as Castile and Aragon.

One of the earliest recorded instances of the name Gumaro appears in the 10th century Codex Aemilianensis, a Latin manuscript from the Monastery of San Millán de la Cogolla in La Rioja, Spain. The name is mentioned in reference to a certain Gumaro Sánchez, a nobleman who donated land to the monastery.

Another early reference to the name can be found in the 12th century Cantar de Mio Cid, a Spanish epic poem that recounts the life of the Castilian hero El Cid. In the poem, Gumaro is mentioned as the name of one of El Cid's trusted knights.

Throughout the centuries, several notable individuals have borne the name Gumaro. One of the earliest was Gumaro Fernández de Castro (c. 1150-1207), a Spanish nobleman and military leader who fought in the Reconquista against the Moors.

In the 16th century, Gumaro Pérez de Ledesma (c. 1520-1590) was a Spanish poet and playwright known for his works in the Renaissance literary tradition.

During the Spanish Golden Age in the 17th century, Gumaro Cárdenas (c. 1610-1678) was a renowned painter and engraver, known for his religious art and portraits of the Spanish nobility.

In the 19th century, Gumaro Montes (1821-1898) was a Mexican politician and military leader who played a significant role in the Reform War and the French Intervention in Mexico.

Finally, in the 20th century, Gumaro Cabrera (1910-1983) was a Mexican writer and poet, known for his works that explored themes of indigenous culture and social injustice.