Emma's sons Hardicanute and Edward the Confessor died without issue. But she also had a daughter, Goda, who married Drew, Count of Mantes, and they had Ralph the Timid, Earl of Hereford.
Their descendants aren't traced by Richardson, but it seems well established that they were ancestors of Sudeleys, Cliffords, la Warres and Grandisons.
Which means Emma has zillions of living descendants.
Colonial Gateways descended from Emma
Abell, Alsops, Argall, Asfordby, Aubrey, Barham, Batt, Battes, Baynton, Beckwith, Beresford, Bernards, Beville, Bladen, Blakistons, Bolles, Booth, Bosvile, Bourchier, Brents, Bressey, Bromfield, Bull, Butlers, C Calvert, Carleton, Chetwode, Clarke, Clarkson, Codd, Corbin, Crymes, Cudworth, Dade, Davie, Digges, Drake, Farrer, Fenwick, Filmer, Fisher, Fleete, Goddard, Gurdon, Harleston, Horsmanden, Humphrey (Mass), Jennings, Launce, Levis, Lightfoots, Lovelaces, Ludlows, Lunsford, Lynde, Mackworth, Mallorys, Mansfields, Marshall, Mauleverer, More, Needs, J&M Nelson, P&T Nelson, Newton, Owsley, Oxenbridge, Pelham, Peyton, Poles, Randolphs, Reade, Rodneys, Rudyard, St John, St Leger, Saltonstall, D Scott, Skepper, A Skipwith, D&G Skipwith, Somerset, Stockman, Stoughton, Stratton, Throckmorton, Torreys, Touteville, Welby, Wests, Wyatts and maybe more.
Royals descended from Emma are Edward IV and all later kings except Henry VII, but nobody earlier, that we know of.
WikiTree has more lines through an "Uncertain" daughter, Clarice la Warre. Vis. Kent 1571 pt 1 p 39 makes Roger Savage's wife a daughter of "Lord Delaward". The Bellewes article in The Genealogist adds more specifics, but not sources. Does not mention Everingham. Richardson has Everingham but does not identlfy his wife Clarice. Any news or views on this lady?