All three ambulances are of the model "Nilsson V70 / XC70" brand
Nilsson is a company making limousines, hearses and ambulances from Volvos.
Because they are so heavily modified they are classed as a different vehicle and therefore are registered as Nilsson.
http://www.nilsson.se/
Their latest ambulance are built on the new XC90 as the V70/XC70 (which the model was built on) no longer are manufactured.