Perhaps you should try some spelling variations:
"sir thomas dickson, 1st baronet" » "sir thomas jackson, 1st baronet", "sir thomas denison, 1st baronet", "sir thomas dixon, 1st baronet", "sir thomas dickson, 1st baroness", "sir thomas dickson, 1st baron", "sir thomas dickson, first baronet"
"sir thomas dawson, 1st baronet" » "sir thomas dawson, 1st baroness", "sir thomas dawson, 1st baron", "sir thomas dawson, first baronet"

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 dickson, 1st baronet\") OR (\"sir thomas dawson, 1st baronet\"))".
• Removing quotes may allow a broader search: (( sir thomas dickson, 1st baronet ) OR ( sir thomas dawson, 1st baronet )).
• Adding a wildcard symbol may retrieve word variants: (("sir thomas dickson, 1st baronet") OR ("sir thomas dawson, 1st baronet"))*.