A digraph is when more than one letter have a single sound...like /ea/ in bread or /ch/ in chat. Digraphs can come at the front, middle, or end of word and can be consonants or vowels. Blends are...
We are in the modern age.
However, the Elizabethans probably thought that they were in the modern age.
We will get a proper name in about a hundred years, when we aren't modern anymore