Perhaps you should try some spelling variations:
"sir thomas richardson, first baronet" » "sir thomas richard, first baronet", "sir james richardson, first baronet", "sir thomas richardon, first baronet", "sir thomas richardson, first barrier", "sir thomas richardson, first tyrone"
"sir thomas richards, 1st baronet" » "sir thomas richard, 1st baronet", "sir thomas richards, 1st baron", "sir thomas richards, colt baronet", "sir thomas richards, luss 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, colt baronet", "sir thomas dickson, luss 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.

• If you are trying to use Boolean operators, they must be ALL CAPS: (((("sir thomas richards, 1st baronet") OR ("sir thomas richardson, first baronet"))) OR ((("sir thomas dickson, 1st baronet") OR ("sir thomas dickson, 1st baroness")))).
• Removing quotes may allow a broader search: (((( sir thomas richards, 1st baronet ) or ( sir thomas richardson, first baronet ))) or ((( sir thomas dickson, 1st baronet ) or ( sir thomas dickson, 1st baroness )))).
• Adding a wildcard symbol may retrieve word variants: (((("sir thomas richards, 1st baronet") or ("sir thomas richardson, first baronet"))) or ((("sir thomas dickson, 1st baronet") or ("sir thomas dickson, 1st baroness"))))*.