We know that Percy married a woman named Audrey. But very little info is given about her. To start, we don't even know her maiden name! Do you have any knowledge about her?
The best mention I can see to Audrey is in the Pottermore article on the The Weasley family tree and here it just mentions a first name with no maiden name. The text version isn't much better and still refers to her as just Audrey.
Audrey was married to Percy Weasley. Together they had two daughters named Molly and Lucy. It is unknown if Audrey ever worked for the Ministry but, thanks to her husband, no doubt she knew all their rules and regulations in detail.
Unknown, but presumably a "Percy-like" name.
The only time Rowling has directly discussed Percy's wife is in the 2007 documentary, J.K. Rowling: A Year in the Life. As part of the documentary, Rowling drew out a family tree showing the main characters after book seven.
Percy married Audrey — Don't you think that's a very Percy-like wife's name? — And they had Molly and Lucy.
J.K. Rowling: A Year in the Life (This line appears at 32:36)
The only comment given about Audrey was that she had a "Percy-like" name. It's possible that Rowling used similar criteria for choosing her maiden name.
The day before the documentary aired, a low resolution scan of the family tree posted behind the secret door of Rowling's old website, where it remained until the site closed in 2012.
Besides for these two places, Rowling has never as much as mentioned Audrey. Percy appears twice in the 2014 Quidditch World Cup writings, but nothing is said about his wife. (It's loosely implied though that he was still married.)