Ríþig

According to the Old English Dictionary:

es;

ríþig

n. : e; f. (?) A stream :-- Hit cymeþ on ðæt lytle ríþig, of ðæm ríþige, Cod. Dip. Kmbl. iii. 33, 1. On ðæt ríþig, ondlong ríþiges, 378, 15. Swá on ða ealdan díc, andlang díces on áne ríþige, of ðære ríþe on áne ealde díc, 385, 24. On hweólríþig, 381, 8. riþig