Perhaps you should try some spelling variations:
"sir thomas nicholson, 1st baronet" » "sir thomas richardson, 1st baronet", "sir thomas wilson, 1st baronet", "sir thomas thomson, 1st baronet", "sir thomas nicholson, 1st baron", "sir thomas nicholson, first baronet", "sir thomas nicholson, colt baronet"
"sir james nicholson, 1st baronet" » "sir james richardson, 1st baronet", "sir james nicholson, 1st baron", "sir james nicholson, first baronet", "sir james nicholson, colt baronet"
"sir thomas dickson, 1st baronet" » "sir thomas jackson, 1st baronet", "sir thomas dawson, 1st baronet", "sir thomas denison, 1st baronet", "sir thomas dickson, 1st baron", "sir thomas dickson, first baronet", "sir thomas dickson, colt baronet"
"sir thomas dickson, 1st baroness" » "sir thomas jackson, 1st baroness", "sir thomas dawson, 1st baroness", "sir thomas denison, 1st baroness", "sir thomas dickson, 1st baron", "sir thomas dickson, _ baroness"

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"sir thomas nicholson, 1st baronet\") OR (\"sir james nicholson, 1st baronet\"))) OR (((\"sir thomas dickson, 1st baronet\") OR (\"sir thomas dickson, 1st baroness\"))))".
• Removing quotes may allow a broader search: (((( sir thomas nicholson, 1st baronet ) OR ( sir james nicholson, 1st baronet ))) OR ((( sir thomas dickson, 1st baronet ) OR ( sir thomas dickson, 1st baroness )))).
• Adding a wildcard symbol may retrieve word variants: (((("sir thomas nicholson, 1st baronet") OR ("sir james nicholson, 1st baronet"))) OR ((("sir thomas dickson, 1st baronet") OR ("sir thomas dickson, 1st baroness"))))*.