Disambiguation evidence for Robert de Ferrers, 6th Earl of Derby via surface form

"Robert de Ferrers, 6th Earl of Derby"

Triples (1)

Triples where some other subject referred to this entity as "Robert de Ferrers, 6th Earl of Derby".

Baron Ferrers of Chartley → hasFirstHolder →
"Robert de Ferrers, 6th Earl of Derby"
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