Yes, but they do not need to be in the same cemetery. The spouse and minor children gain eligibility based on the veteran's eligibility. As it sometimes happens, the spouse or the child may predecease the veteran. They may be buried in cemetery X, and the veteran may move across the country and die and be buried in a cemetery over there. So they may not necessarily be in the same cemetery.
On March 9th, 2009. See this statement in context.