Lelouch is NOT related to the Ashfords. They had been supporters of Lelouch's mother, Empress Marianne and were in turn protected and ennobled. But when she was assassinated, they lost everything, hence why Millay's considering an omiai (marriage interview) to save the Ashford's financial predicament and why Lelouch chose to ask that specific family for help, and not anyone else.
(no subject)