Cazañas's mother, Enriqueta García y Martín, was heiress of the García family of Spain. At the age of sixteen, Enriqueta was the subject of a poem included in the 1878 "Jardín Matancero" ("Matanzas Garden"). The publication was a literary collection dedicated to the debutantes of the Matanzas region's most prominent families in which a flower-themed poem was dedicated to each emerging ("blossoming") socialite. As an adult she owned the vast Finca Buena Vista overlooking Varadero, its champion horses, and yacht while her husband Francisco would manage the estate's staff and grounds. The property was damaged in the Spanish–American War and became the center of the couple's high-profile claims to the Spanish Treaty Claims Commission. The couple, which traveled frequently to the United States and would occasionally reside there, first filed their claims with the commission in 1902, the year Pedro Pablo was born. It took six years to settle their claims, in which Francisco's legal background and US ties proved useful. Their claims were finally settled in 1908 when the Secretary of the Treasury of the United States awarded the couple total compensation of $13,138 ($9,738 to Enriqueta and $3,400 to Francisco), equivalent to over $360,000 in 2020, adjusted for inflation. They received the second highest awards granted by the commission, and the highest among private citizens not representing a corporation. Her brother (Pedro Pablo's uncle), Félix García y Martín, was a prominent doctor and insurrection figure during the Cuban War of Independence who became the second highest-ranking doctor in the Matanzas province and was later Chief Doctor of the Port of Matanzas and Head of Administration.