Grandma VanVuuren and her six children

I believe "Grandma VanVuuren" would have to be Maartje (DeJong) VanVuuren, mother of Tryntje (Kate), and grandmother of Richard Hine Sr. She's second from the right, sitting in the bottom row.

Maartje gave birth to seven daughters and three sons. One son, Jacob, died in infancy. Jacob #2 died date unknown. Roel (who I believe is the man in the picture) lived 1862-1945. All seven of her daughters (Grietje, Gertrude, Geertje, Tryntje, Maggeltje, Guurtje, and Anna) survived until adulthood, although Anna died at age 19, in the year 1900. It would make sense that this photo depicts five of Maartje's six surviving daughters, and her son Roel.

I'm going to guess the photo was taken between 1900 and 1911, between the deaths of young Anna and her mother Maartje. One could narrow it down further, to between 1906 and 1911, by assuming Grandpa (Dirk) VanVuuren would have been in the photo, were he still alive.

After comparing the faces with this photo of Tryntje (Kate) and Albert Heun, I believe Kate is in the top row, on the left. Maartje is in the bottom row, second from the right.

Gertrude, I'm guessing, is in the top row, on the right, based on her resemblance to "Aunt Gertrude" in this photo.