The shared bath between Bedrooms 2 and 3 includes separate toilets and vanities. Plan 56-604
The Jack and Jill bathroom is a popular developer-derived term and refers to a bathroom connecting two bedrooms. The best shared bathrooms combine efficiency and privacy -- the water closet is usually enclosed, while the vanity or vanities are part of the hallway connecting the two bedrooms. Here are some examples.Plan 51-458
puts the vanities in the more public pass-through.
In Plan 17-213
3 the vanity pass-through is offset between Bedrooms 3 and 4.