The origins of the Rambo may date back to the American colony of New Sweden, when in 1637 Peter Gunnarsson Rambo, a Swedish immigrant, arrived on the Kalmar Nyckel. In "Addenda to the Diary," published with the 1963 edition of Peter Kalm's Travels in North America, 1747-51, the editor includes notes of Kalm's interview with Mr. Peter Rambo, grandson of Peter Gunnarsson Rambo, where it is stated that the original Peter Rambo, when he emigrated, had brought apple seeds and several other tree and garden seeds with him in a box.[1] The first Rambo apple tree may have been produced from one of these seeds, or could have been developed by one of his descendants. There is no certainty, since the earliest documented mention of the apple variety's origin occurs in William Coxe's A View of the Cultivation of Fruit Trees, and the Management of Orchards and Cider, published in 1817. Coxe wrote only that the Rambo was much cultivated in Delaware, Pennsylvania, and New Jersey and took "its name from the families by whom it was introduced into notice." Since apple trees do not grow true from seed,[2] and Rambo brought seeds, not scionwood, if the first Rambo tree grew from one of those seeds, the variety would be one of the first truly American apples.

The greenish yellow apple with dull red stripes ripens from mid-summer to early fall. Little known today, the Rambo was once widely grown, but in a limited geographical range from the mid-Atlantic states west into the middle Prairie states.

From Wiki

Well, that's another apple I would like to try.