Hi Julie.
I am Ruth Muttlebury, my late husband was Edward Muttlebury and his father (Peter Muttlebury) had done a reasonable amount of research into the Muttlebury family in the 1960s. The name seems to attract a lot of interest and remnants of family links are scattered between Canada, Ireland, New Zealand and Australia as well as here in Devon.
The name has also acquired various spellings over the years so tracing through online searches can often miss vital records. Motelberie, de Motelbrie, Muttelberry etc to name a few.
The Muttlebury family did have a connection with John Smith in Exeter. There was once a handpainted Coat of Arms on the wall in Exeter Cathedral mixing the dexter and sinisters of Smith with Muttlebury. However, when I went there about five years ago it was remarkably worn away and barely legible to be of value. The Muttlebury coat of arms is an ermine shield with bend gules in red and three buckles. The crest is a hare courant.
The name Alice Muttlebury does not show up in any search on Find My Past - I system I use regularly to search my father's family line and so far - pretty reliable. However various sources pick it up in Exeter in the 1500s. Some also affix the title 'Lady' to Alice. My late husband was never convinced this was the case. The Muttlebury's were basically Yeomanry so untitled. The first Muttlebury in England was understood to be a young Squire in the army of William the Conqueror, having served under Alan Duke of Brittany. The Muttlebury coat of Arms and its ermine shield would confirm that link absolutely. The flag of Brittany even today has an ermine quartering.
Years later, Lt Col George Muttlebury served bravely in the Battle of Waterloo. The Dutch awarded him some sort of honour post-Battle due to a muck up Prince William of Orange made in the heat of battle which George had to try and unravel quickly and against frightening odds, which allegedly made him 'Sir George Muttlebury' but the title was only recognised on the continent and not in Britain.
I was interested to see the name Walker pop up. I have uncovered a Walker on my late father's side of the family. There weren't that many in Devon.
Best Wishes
Ruth