Harm Altena, born on March 16, 1911.

He was married to
Geertje Blom, born on February 26, 1910.

• 1 : Maria, born in Balkbrug on August 1, 1935.
  She was married in Avereest on February 20, 1959 to Roelof Gezinus Maring, born in Warffum on September 19, 1934, son of Harm Maring and Kaatje Hammingh.