"I don't know how long it's going to take for me to get over this feeling", Robinson said.
Robinson and Macfarlane were born 15 months apart in Hawaii.
"It was so amusing because when we played for Punahou, we were both first string and we're brothers, playing side by side", Macfarlane told KITV.
They also shared a special bond throughout their friendship.
"I had a younger brother that I lost when I was 19 so I had never nieces or nephews and I thought I'd never know my birth mother, I'll never have any nieces or nephews", Walter said. Independent of one another, they both turned to DNA websites to fill in the gaps of their family histories this year after having little luck searching for answers on their own.
A ideal match for his X chromosome came up with the name Robi737, who he also shared other DNA with.
Trinity plans Christmas Eve services
Christmas Eve services include the regular services at 8 and 10:30 a.m. with a children's Christmas pageant set to begin at 7 p.m. Christmas Eve service that includes carols, Holy Communion, an original Christmas story and a candle-lighting ceremony.
The discovery came when Macfarlane used Ancestry.com to look up his family roots and found that he was a close DNA match to somebody already on the site who went by Robi737.
Both men discovered they shared the same birth mother. "He was a pilot", Walter's daughter Cindy MacFarlane said.
"Yeah hairy arms, that did it!" They, then, surprised their friends and family with the news over the weekend.
They plan to travel and enjoy retirement together.
At this time of year, Christmas shopping lists occupy the minds of family members across the country, and we all try to find our loved ones that "perfect gift".
"I've never gotten a Christmas present this good", Robinson told KITV.
This post originally appeared on our sister station KHON2.