The Basque family of Tellería was first noted in the Gipuzkoan county of Vergara in the 16th century and parish documents confirm their presence in the town of Antzuola since the early 18th century.
The first direct ancestor of Agustín which can be traced is his strictly paternal great-grandfather Silvestre Antonio Tellería Ugalde, married to Clara Ignacia Lascurain Argarate and living in Antzuola in the early 19th century.
His son and Agustín’s paternal grandfather, Miguel Ignacio Telleria Lascurain (born 1807), married Maria Oyarzabal Idiazabal.
None of the sources consulted provides any information on what they did for a living; the couple settled in their native town and had at least 9 children, born between 1833 and 1854.
Their third son and Agustín’s father, Jose Cipriano Telleria Oyarzabal (1849-1938), in 1877 married Micaela Ynurrita Gorosabel; the couple had 2 children, both daughters.
Following early death of his wife in 1882, one year later Telleria Oyarzabal re-married with Maria Esteban Mendizábal Elgarresta (died 1913), a girl from the nearby village of Urretxu and descendant to a family which already had been related to the Tellerías.

The couple formed part of the local bourgeoisie.
Since the late 18th century Antzuola, though a fairly small town, was a provincial tanning centre.
Tellería Oyarzabal owned one of 4 manufactures operational in the municipality and developed it into the most successful one, with branches in other Gipuzkoan locations; it produced belts, footwear, holsters, saddles and other leather goods, mostly for the army.
Agustín was born into considerable wealth; it is not clear whether apart from two half-sisters from the first marriage of his father he had any other siblings; sources do not mention any.
It is neither known where he commenced education, whether he attended secondary school and whether he entered a university.
Because he was later referred to as “farmacéutico” and because his father was running a chemistry-related business, it is likely that Tellería received some sort of chemical education, completed probably in the early 1900s.

At unspecified time prior to 1913 Tellería wed Maria Legorburu from the nearby Gabiria (died after 1959); close to nothing is known about her family, except that it was of distinguished noble past and that the families had already intermarried.
The couple settled in Antzuola and had at least 10 children: Mercedes, Blanca, María Luisa, Vicente, Juan, José, José Joaquín, Agustín, Luis and Ignacio Tellería Legorburu.
Like one of his uncles, José served as mayor of Antzuola; he was killed as requeté in 1937.
Juan and José Joaquín entered a religious order.
The only one who became sort of a public figure was Ignacio, a well-recognized Madrid physician.
Among Agustín’s grandchildren the best known is the Tellería Chávarri branch.
Isabel as a child briefly became a movie star with her role in El espiritú de la colmena (1973), which turned out to have been her only film.
Her sister Alicia is a movie production manager, while María is spokesperson for EU-related human-rights organizations and author.
The Basque family of Tellería was first noted in the Gipuzkoan county of Vergara in the 16th century and parish documents confirm their presence in the town of Antzuola since the early 18th century. The first direct ancestor of Agustín which can be traced is his strictly paternal great-grandfather Silvestre Antonio Tellería Ugalde, married to Clara Ignacia Lascurain Argarate and living in Antzuola in the early 19th century. His son and Agustín’s paternal grandfather, Miguel Ignacio Telleria Lascurain (born 1807), married Maria Oyarzabal Idiazabal. None of the sources consulted provides any information on what they did for a living; the couple settled in their native town and had at least 9 children, born between 1833 and 1854. Their third son and Agustín’s father, Jose Cipriano Telleria Oyarzabal (1849-1938), in 1877 married Micaela Ynurrita Gorosabel; the couple had 2 children, both daughters. Following early death of his wife in 1882, one year later Telleria Oyarzabal re-married with Maria Esteban Mendizábal Elgarresta (died 1913), a girl from the nearby village of Urretxu and descendant to a family which already had been related to the Tellerías. 
The couple formed part of the local bourgeoisie. Since the late 18th century Antzuola, though a fairly small town, was a provincial tanning centre. Tellería Oyarzabal owned one of 4 manufactures operational in the municipality and developed it into the most successful one, with branches in other Gipuzkoan locations; it produced belts, footwear, holsters, saddles and other leather goods, mostly for the army. Agustín was born into considerable wealth; it is not clear whether apart from two half-sisters from the first marriage of his father he had any other siblings; sources do not mention any. It is neither known where he commenced education, whether he attended secondary school and whether he entered a university. Because he was later referred to as “farmacéutico” and because his father was running a chemistry-related business, it is likely that Tellería received some sort of chemical education, completed probably in the early 1900s.
At unspecified time prior to 1913 Tellería wed Maria Legorburu from the nearby Gabiria (died after 1959); close to nothing is known about her family, except that it was of distinguished noble past and that the families had already intermarried. The couple settled in Antzuola and had at least 10 children: Mercedes, Blanca, María Luisa, Vicente, Juan, José, José Joaquín, Agustín, Luis and Ignacio Tellería Legorburu. Like one of his uncles, José served as mayor of Antzuola; he was killed as requeté in 1937. Juan and José Joaquín entered a religious order. The only one who became sort of a public figure was Ignacio, a well-recognized Madrid physician. Among Agustín’s grandchildren the best known is the Tellería Chávarri branch. Isabel as a child briefly became a movie star with her role in El espiritú de la colmena (1973), which turned out to have been her only film. Her sister Alicia is a movie production manager, while María is spokesperson for EU-related human-rights organizations and author.
Agustín Tellería Mendizábal