1885 marriage Anton Julius Evenson to Olava Tronds

My grandparents, Anton Evenson b. 7/24/1861 and Olava Trondsen b.10/ 1858 emigrated from Norway to Boston Nov. 1887, SS Catalonia. I have traced Olava's family to Skedsmo but have conflicting information on Anton. His death certificate reads his father is Even Eriksen. I thought a marriage record would give me more information. 1890 US census reads they have been married 15 years. I have ships lists, citizenship papers, death certificates etc. All say only "Norway" for place of birth. Anton was in the military before emigrating. Their first born, Einar, my father, should have been named after his grandfather, if I have the patronymic naming system correct. Any help would be greatly appreciated.