nope, it's a consensus protocol developed by some mathematician and adopted by Stellar. PoW and PoS are also consensus protocols. PoW  was proposed by Satoshi. PoS ..... there are many of them. First PoS was implemented by NXT.

Look here https://bitcointalk.org/index.php?topic=2867986.msg29448107#msg29448107 where  there are relevant Q&A . BTW, do you know that every holder of XLM can receive  the inflation covering coins on a weekly ground?