Presbyterianism:

In the mainly Christian Indian state of Mizoram, the Presbyterian denomination is the largest denomination; it was brought to the region with missionaries from Wales in 1894. Prior to Mizoram, the Welsh Presbyterians (missionaries) started venturing into the north-east of India through the Khasi Hills (presently located within the state of Meghalaya in India) and established Presbyterian churches all over the Khasi Hills from the 1840s onwards. Hence there is a strong presence of Presbyterians in Shillong (the present capital of Meghalaya) and the areas adjoining it. The Welsh missionaries built their first church in Sohra (aka Cherrapunji) in 1846. Presbyterians participated in the mergers that resulted in the Church of North India and the Church of South India.Sohra

Please answer a question about this article. If the question is unanswerable, say "unanswerable". Before Mizoram, what was the name of the group of  missionaries that  ventured into east india?
Welsh Presbyterians