Sebastian Joseph ( Devasiachan),) was born on 18^th Sep 1952. as the second son of O M Joseph and Claramma. After graduation from SB College, he joined as Chemist at Indian Organic Chemicals Ltd, Khopoli and retired as Senior Scientist. He married to Rosamma D/o Appachan/Pennamma of Kochiedanattu family, Changanacherry on 09^th Jun 1986.They have two children.

1. Son- Maj Sijo Sebastian Olassayil

2, Daughter--Sancy Sebastian  Olassayil