Ok, this has been bugging me for days. What was Scyllua Darkhope's surname before she was corrupted?
Was it mentioned in the Last Mythal Trilogy? I remember something about her recollecting her childhood a bit.
Everything I am finding indicates first name, with Darkhope being adopted after her mother attracted the attentions of Teldorn Darkhope, a Zhent nobleman.
She did not repudiate her work for Tyr until around 1370, when she became a Blackguard of Bane. It appears that she adopted the name Darkhope as a child and was a devoted to Tyr as Darkhope as well from what I read.