It is an Indian name. (One of the names of Lord Ganesha). It is derived from sanskrit Siddhi meaning enlightenment and Vinayak meaning Remover of obstacles.
Siddhivinayak Temple,

"Shri Siddhivinayak Namo Namah Ganpati Bappa Maurya"
by Sidd1800_v November 24, 2021
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