Snowy and the Seven Doves by Jude Knight

As a child, Snowy White was found beaten and half dead in an alley. Seven soiled doves rescued him and raised him to manhood in their brothel. Now adult, he must rise above his origins to hunt down the enemy who tried to kill him.

When she found herself in the wrong place at the right time, Lady Margaret Charmain’s life was saved by the man she knows as Snowy White. So when his self-titled aunt asks Margaret to help him make his way into the ton, she agrees to help, not knowing he intends to use the opportunity to confront his wicked stepfather.
Margaret upends Snowy’s negative conceptions about Polite Society, especially as her associates and friends come to his aid and to help him reclaim his stolen title from Viscount Snowden. Before long, he realizes his destiny includes her as his wife; after all, she wakened him to his true self with her kiss.
But the fraudulent Lord Snowden will stop at nothing to hide his misdeeds, even murder. Will Snowy be able to prove his identity, claim his birthright and make Margaret his viscountess before his stepfather succeeds in eliminating him forever?