He was son of Suddhodana and Maya, born the crown prince of the Kapilavastu. He was named as “Siddhartha” means "All things fulfilled" by the king. After his birth in very short time his mother died. Fortunately Prajapati-the sister of Maya brought Siddhartha up.
Buddha was saddened by death of living creatures, since his days of childhood. He used to question: "Alas! Do all living creatures kill each other?" He wasn't satisfied with any answers that were given to him and he decided to find out the meaning and the absolute truth.
He taught and observed that all sorrow comes from attachments and desires, so it's better to curb all attachments in order to remain happy.
Lord Buddha is considered as a noble and a divine incarnation (avatar) of Lord Vishnu in assured sects of Hinduism.