Who was Earl Percy in The English Way Poem by Rudyard Kipling?

You're referring to the poem "The English Flag", not "The English Way". In this poem by Rudyard Kipling, Earl Percy is not a character.

"The English Flag" celebrates the history of England, specifically the battles fought under the English flag. The poem mentions historical figures like Henry V, Nelson, and Drake, but Earl Percy is not among them.

It's possible you're thinking of another poem or a different context altogether. Perhaps you can provide more details to help me understand your question better.