Sadhu Sundar Singh (Punjabi: ਸਾਧੂ ਸੁੰਦਰ ਸਿੰਘ (Gurmukhi); سادھو سندر سنگھ (Shahmukhi); born 3 September 1889) was an Indian Christian missionary. He is believed to have died in the foothills of the Himalayas in 1929.
Read about Sadhu Sundar Singh in Wikipedia