1) A regional word for a rush or rushlight.
1579 candel seaves vjd, Stockeld. Angus Winchester has commented on the plant’s domestic uses and noted a reference in 1579 to mowing lez seavethacke in Littondale, and another in 1659 thatche seaves in Lartington. It is a frequent element in minor place-names: 1443 seueker, Tadcaster
1564 the Sevye closes, Ingleby Arncliffe
1631 Rushie close or Seavy close, Spofforth. ‘Half a rood at Seneker’ in an undated thirteenth-century Tockwith deed should probably be Seueker.