Early-attested site in the Parish of Nicholforest
- Haytwayt 1275 Ipm
- Haythawyt 1583 Border
- Hathat 1697 Netherby
'Thwaite where hay is cut,' v. hēg , þveit . Cf. Hathedeharth t. Hy 8DuLa , Hathatyate 1697Netherby , Hathwood yate 1698 ib. For the substitution of -wood for -thwaite cf. Thistlewood (in Castle Sowerby) infra 246.