AFAIK the Cedre Villa project Phase 2 has 4 types of villa.
Traditional Townhouse (the one I live in) is 3 bedroom with study & maids' room. This is the same for the Arabic and the Modern styles. The Executive Modern is 4/5 bedroom I believe, but the price is astronomical - AED 195K per year.
Traditional, Arabic & Modern are all 3 bedroom etc as stated above, and share similar sized floor space, but it's the size and shapes of the third bedroom and maids room that differs greatly between the three. The villa with the best sized 3rd bedroom and maid's room is the Tradition Townhouse Middle type (not the end type). The Arabic and Modern have very small 3rd bedrooms and the maid's room is a shoe box - a very tiny shoe box (getting a standard single bed in the is impossible).
As for liveable space with three kids.... I have 2 girls sharing one big bedroom and a maid in the maid's room. The study is my workshop... Plenty of space for everyone so far.... If you have three kids whom are in their teens etc... then it could be a bit of a hassle....