How do you now it’s her hubby and not brother?
Hyphenated:
Nathan Kirk-Coehlo (Kirk-Coehlo), Davis, CA California
www.classcreator.com/Davis-CA-Davis-Senior-1999/class_profile...
Classmate Profile for Nathan Kirk-Coehlo (Kirk-Coehlo), Davis Senior High School Class Of 1999
Another, not hyphenated:
ProQuest Document View - Detection methods for ...
gradworks.proquest.com/34/13/3413342.html
Detection methods for astronomical time series by Coehlo, Nathan Kirk, Ph.D., UNIVERSITY OF CALIFORNIA, BERKELEY, 2010, 118 pages; 3413342
Well, he uses both the hyphenated and unhyphenated version of his last name. If they were siblings who both got that hyphenated name from their parents, then he would use only the hyphenated name, no?