Fyllend

According to the Old English Dictionary:

es;

fyllend

m. A fulfiller, performer; exsĕcūtor :-- Ðara þinga ðe he óðre lǽrde to dónne, he sylfa wæs se wilsumesta fyllend eōrum quæ agenda dŏcēbat ĕrat exsĕcūtor devōtissĭmus, Bd. 5, 22; S. 644, 4. fyllend