Answer by taking a quote from the following article:

Jiddu Krishnamurti (;11 May 1895 - 17 February 1986) was a philosopher, speaker and writer. In his early life he was groomed to be the new World Teacher but later rejected this mantle and withdrew from the Theosophy organization behind it. His subject matter included psychological revolution, the nature of mind, meditation, inquiry, human relationships, and bringing about radical change in society. He constantly stressed the need for a revolution in the psyche of every human being and emphasised that such revolution cannot be brought about by any external entity, be it religious, political, or social.

The date of birth of Jiddu Krishnamurti is a matter of dispute. Mary Lutyens determines it to be 12 May 1895 but Christine Williams notes the unreliability of birth registrations in that period and that statements claiming dates ranging from 4 May 1895 to 25 May 1896 exist. She uses calculations based on a published horoscope to derive a date of 11 May 1895 but "retains a measure of scepticism" about it. His birthplace was the small town of Madanapalle in Madras Presidency (modern-day Chittoor District in Andhra Pradesh). He was born in Telugu speaking family. His father, Jiddu Narayaniah, was employed as an official of the British colonial administration. Krishnamurti was fond of his mother Sanjeevamma, who died when he was ten. His parents had a total of eleven children, of whom six survived childhood.  In 1903 the family settled in Cudappah, where Krishnamurti had contracted malaria during a previous stay. He would suffer recurrent bouts of the disease over many years. A sensitive and sickly child, "vague and dreamy", he was often taken to be intellectually disabled, and was beaten regularly at school by his teachers and at home by his father. In memoirs written when he was eighteen years old Krishnamurti described psychic experiences, such as seeing his sister, who had died in 1904, and his late mother. During his childhood he developed a bond with nature that was to stay with him for the rest of his life.  Krishnamurti's father retired at the end of 1907. Being of limited means he sought employment at the headquarters of the Theosophical Society at Adyar. In addition to being a Brahmin, Narayaniah had been a theosophist since 1882. He was eventually hired by the Society as a clerk, moving there with his family in January 1909. Narayaniah and his sons were at first assigned to live in a small cottage which was located just outside the society's compound.

Did he have siblings?
His parents had a total of eleven children, of whom six survived childhood.