Hijltje van der Ploeg, born circa 1848, blacksmith' hand and blacksmith.

Hijltje was married to
Maaike Osinga, born circa 1861 (?).

• 1 : Sybren van der Ploeg, born in Menaldum on August 26, 1884, casual labourer, died in Harlingen on April 6, 1925, aged 40 years.
  Sybren was married in Harlingen on April 28, 1921, at the age of 36 to Jeltje Tichelaar (aged 28 years), born in Harlingen on July 13, 1892, daughter of Bauke Tichelaar (workman and dock hand) and Fetje van der Geest, died in Harlingen on December 26, 1921, aged 29 years.