- The form Yildhall/Yeeldhall is attested at various times throughout the 17th century and looks back to the Old English palatalization of guttural consonants before front vowels.
However, analogy with other inflected forms of the same word or with words in other Germanic languages (e.g. Old Norse) reintroduced the guttural consonant.
The yild,yeeld/guild variation is also to be seen in other words.
See E. Dobson:English Pronuciation 1500 - 1700. Vol. 2 para.375a.