This recently went out from PON consortium:
The Program on Negotiation Graduate Research Fellowships are designed to encourage young scholars from the social sciences and professional disciplines to pursue theoretical, empirical, and/or applied research in negotiation and dispute resolution. Consistent with the PON goal of fostering the development of the next generation of scholars, this program [...]

I just received this announcement regarding graduate fellowships at Harvard’s Program on Negotiations
Graduate Fellowships at Harvard
Application
Applications are accepted on a rolling basis until May 1.
Doctoral candidates in the fields of economics, psychology, sociology, anthropology, international relations, public policy, urban planning, business, and law are encouraged to apply. Doctoral candidates must have completed all degree requirements [...]

I just received this announcement about the David-Putter Scholarship. Judging by past scholarships, it looks as if both undergraduate and graduate students are eligible, and there’s certainly a heavy overlap with the study interests, practice work, and peace & social justice values of many conflict resolution students.

The Davis-Putter Scholarship Fund provides grants to students [...]