Don't know if you're still looking, but I have these names in cemetery database:
Mattison, Edward E IOOF 02-04-05 7/22/1876 5/3/1900 Yes In memory of / Son of Gaylord & R H Mattison / A loving Son and a kind Bro
Mattison, Gaylord IOOF 02-04-02 8/29/1834 8/25/1893 Yes Born in Penn / DIed at Grants Pass Shared stone w/ R H Mattison Norton
Norton, R H Mattison IOOF 02-04-03 5/16/1843 11/26/1943 Yes He giveth his beloved sleep Shared stone w/ Gaylord Mattison
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for pictures of their markers.