Why does the narrator call Pescud 'Trevelyan'?

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Trevelyan, the hero of the best seller ‘The Rose Lady and Trevelyan’ chases a royal lady to her home. He .gets introduced to her, woos her and eventually marries her despite a huge difference in their social positions. Pescud’s romance also runs on the same ’ lines. Hence, the narrator calls him ‘Trevelyan’.