Somebody named Alex asked this question 1 week ago by email, and we responded:
view = View(
Item('object.father.name'),
Item('object.dog.name'),
)
See the bottom of http://docs.enthought.com/traitsui/traitsui_user_manual/advanced_view.html#multi-object-views
If you are the same Alex, you might want to tweak your spam filters (enthought.com and enthought.zendesk.com)