Sentence:  highly discontented to understand the great numbers of negars and <WSD>Blackamoors</WSD> which (as she is informed) are crept into this realm... who are fostered and relieved [i.e. fed] her to the great annoyance of her own liege people, that want the relief [i.e. food], which those people consume, as also for that the most of them are infidels, having no understanding of Christ or his Gospel. 
Meaning of the word marked with <WSD> tags:  A Moor.