Most of Britain’s richest women derived their wealth through inheritance and marriage. 

However, some of the 20 female billionaires and dozens of female multi-millionaires, racked up their riches founding their own companies or being successful in their own right, according to the Sunday Times’ 2017 Rich List published this week.

For example, Bet365 founder Denise Coates racked up an enormous fortune from a gambling empire she created. She is the 22nd richest person in Britain and 5th richest woman in UK with a net worth of £5 billion.

But there are very few that can claim to be truly self-made.

Business Insider decided to take a quick look to see who made the top spots.

31. Lady de Rothschild: Net worth — £675 million ($875.5 million). Lynn de Rothschild owns EL Rothschild, a family investment operation, with husband Evelyn de Rothschild, and can thank him for most of her wealth.

30. May Makhzoumi: Net worth — £700 million ($908.02 million). The wife of Lebanese industrialist Fouad Makhzou gets most of her wealth from her husband. He founded Dubai-based company Future Pipe which makes fibreglass pipes for large infrastructure projects.

29. Ruth Parasol: Net worth — £720 million ($934.03 million). Gibraltar-based Parasol and her former husband Russ DeLeon derived their joint fortune through the launch of Starluck Casino and Partygaming. Partygaming is the parent company of

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