H.C.
I think there are very few MD's out there who are also fully trained and licensed ND's. The training is so vigorous for both, you need alot of cash, or alot of loans and alot of energy and time! There are 2 I know of; Dr Miller - his clinic is on SE 39th, 1/2 block north of Hawthorne. Don't know the name or number of the clinic. There is also Dr Daniel Newman in Vancouver who is both MD, ND and Acupuncturist/Chinese herbs.
Homeopathy is just one aspect of Naturopathic Medicine. I don't know if either of these docs use homeopathy much or not. I have found homeopathy to work really well with my little ones, partly cos it is so easy to give them and so gentle. But it's only effective if prescribed by someone who knows the medicine well. My thinking is that an MD,ND may have so many other tools, they may not know homeopathics as well as an ND. It might be an idea to also seek out an ND that is strong with homeopathy to take them to alongside your physician, at times when you want to try homeopathy first. I would recommend Dr Roman Krupa (ND) at Urban Wellness ###-###-####, www.urbanwellnesspdx.com. Its on the corner of SE 49th and Division. He is a dad of a little one, with another about to arrive and he specialises in pediatrics and homeopathy.
You could also try contacting the Drs offices above to see if they know of any other MD/NDs.