The name Siddharth is a boy's name of Hindi, Sanskrit origin meaning "artha". Siddharth and is often added to lists like Shimmering New Year's Baby Names and discussed in our forums with posts like "Themed Families..".
From the experts:
Siddhartha Gautama was one of the real names of Buddha, making this an impressive and weighty name among the Buddhist community. Among Hindis, Siddharth is strongly associated with the Brahmin caste. King Siddharth was an important figure for the Jains.