The family portrait has been a popular genre of photography since its very beginning. First captured in daguerreotypes, early family portraits required the subjects to sit posed and completely motionless in a studio for an uncomfortably long period of time. Technological advances in photography have allowed for more informal, inexpensive, less-time consuming, and easier to produce family portraits, enabling them to become the common convention that they are today.
Ralph Morse, [Family of Pvt. Raymond Carlton, home on leave after basic training, Warsaw, North Carolina], 1941 (1485.2005)
Unidentified Photographer, [Unidentified Man and Woman], ca. 1845 (2009.36.1)
José A. Figueroa, Mi familia, despedida en calle 17, La Habana (My family, farewell 17th Street, Havana), 1965-67 (2011.37.9)
Brett Weston, Portrait of Weston Family, Los Angeles, 1935 (423.2003)
Unidentified Photographer, [Unidentified Family Group], ca. 1930s (774.1990)
Lee Sievan, Family Portrait on Cherry St., 1957 (32.1990)
Fans in a Flashbulb 
Hi! I just found this blog and read this article about family portraits. I’m Galician (NW in Spain) and since I saw a book of a galician photography I couldn’t stop thinking about all his pictures.
His name is Virxilio Vieitez.
Hope you like it!