Because this name is one of the more common male names in English. 1. In English-speaking countries, "stone" usually refers to hard stones, but it also refers to minerals and jewels, so it can be regarded as a name with strength and solid image. It can also be regarded as a metaphor, implying a firm character.
Besides, "Stone" is also a popular English name, which may be considered as a fashionable and cool choice in some cases.