Because Yogo Gulch lies in a region historically inhabited by the Piegan Blackfeet people, promoters of Yogo sapphires claim that yogo may mean "romance" or "blue sky" in the Blackfoot language, although there is little evidence to support this claim.
由于Yogo峡谷处在Piegan黑脚族历史上聚居的区域，Yogo蓝宝石的推销员声称yogo可能在黑脚族语言中意为“浪漫”或“青天”，尽管几乎没有证据来支撑这一说法。