These were English men of wealth, known as "landed gentry". The father started out as Hugh Montgomery but is identified here as "Hugh Montgomery Willoughby".
He had to add the Willoughby in order to inherit his wife's family property. That's not mentioned in the contract, I did a little research. The other party is Robert Montgomery, a son or relative of some sort. The paper this is written on has a very high cloth content and is extremely tough. It's mounted on that mat now but spent hundreds of year folded up in someone's safe, or desk drawer. The ink has faded and turned rusty, as old inks will since they were mostly iron oxide. The writing is still legible. The wax seals are present but deteriorated.This is a large document, 18"x 15.5" and suitable for display. It was recently framed but no longer is, but still attached to the board.
The reverse side is shown in the last two pictures with a close-up of the writing on the back. I took close-ups of a quarter of the document each for close examination.
This item is in the category "Collectibles\Paper\Documents\Pre-1800". The seller is "2ndhandrosee" and is located in this country: US. This item can be shipped to United States, Canada, United Kingdom, Denmark, Romania, Slovakia, Bulgaria, Czech Republic, Finland, Hungary, Latvia, Lithuania, Malta, Estonia, Australia, Greece, Portugal, Cyprus, Slovenia, Japan, China, Sweden, Korea, South, Indonesia, Taiwan, South Africa, Thailand, Belgium, France, Hong Kong, Ireland, Netherlands, Poland, Spain, Italy, Germany, Austria, Bahamas, Israel, Mexico, New Zealand, Philippines, Singapore, Switzerland, Norway, Saudi Arabia, United Arab Emirates, Qatar, Kuwait, Bahrain, Croatia, Republic of, Malaysia, Chile, Colombia, Costa Rica, Panama, Trinidad and Tobago, Guatemala, Honduras, Jamaica, Antigua and Barbuda, Aruba, Belize, Dominica, Grenada, Saint Kitts-Nevis, Saint Lucia, Montserrat, Turks and Caicos Islands, Barbados, Bangladesh, Bermuda, Brunei Darussalam, Bolivia, Egypt, French Guiana, Guernsey, Gibraltar, Guadeloupe, Iceland, Jersey, Jordan, Cambodia, Cayman Islands, Liechtenstein, Sri Lanka, Luxembourg, Monaco, Macau, Martinique, Maldives, Nicaragua, Oman, Pakistan, Paraguay, Reunion, Uruguay.