Definition of "soever"

How long soever it hath continued, if it be against reason, it is of no force in law.

1669, John Owen, A Practical Exposition on the 130th Psalm

For, by the fundamental Laws of the Realm, it is Capital in any Perſon, of what Quality ſoever, to make water within the Precincts of the Palace.

1726 October 28, [Jonathan Swift], “The Author by an Extraordinary Stratagem Prevents an Invasion. […]”, in Travels into Several Remote Nations of the World. […] [Gulliver’s Travels], volume I, London: […] Benj[amin] Motte, […], part I (A Voyage to Lilliput), page 91

And in the meanwhile, Society shivered a little feverishly, filled now with the scions of those who had come over with the Jewish and American Conquests. Escutcheons were becoming valueless, how sinister soever the blots and clots upon them.

1922, Michael Arlen, “1/5/1”, in “Piracy”: A Romantic Chronicle of These Days‎