Erinchin Lobsang Tayiji was a prince of the Khalkha

Khalkha

Khalkha is the largest subgroup of Mongol people in Mongolia since 15th century. The Khalkha together with Tsahar, Ordos and Tumed, were directly ruled by the Altan Urag Khans until the 20th century; unlike the Oirat people who were ruled by the Dzungar nobles or the Khorchins who were ruled by...

 federation in western Mongolia. See Altan Khan of Khalkha

Altan Khan of Khalkha

The Altan Khans ruled north-western Mongolia from about 1609 to 1691 at the latest. Altan Khan of Khalkha also known as Altan Khan of Khotgoid ruled over khotgoids in northwestern Mongolia and belonged to the Left Wing of the Khalkha Mongols...

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In 1662 he attacked, captured and put to death his eastern neighbor, the Dzasagtu Khan. This led the senior Tushetu Khan (Chaghun Dorji) to form a league and drive out the Altan-khan. In 1667 he was captured by Sengge, the Dzungar

Zunghar Khanate

The Zunghar Khanate was a nomadic power on the Eurasian steppe. It covered the area called Dzungaria and stretched from the west end of the Great Wall of China to present-day eastern Kazakhstan, and from present-day northern Kyrgyzstan to southern Siberia .In 1678 Galdan received from the Dalai...

 chief and was handed over to the (next) Dzasagtu Khan . With the help of the Dzunghars and Peking (divide and conquer), he was able to reinstate himself, but in 1682 he was captured by the Dzasagtu Khan. In 1691 he, and his khanate, disappear from the records.