Find Duplicates Facility

The program works out the percentage match between everyone in a GenBase. You choose the threshold above which matches will be displayed. You can then choose to Compare individuals and see the Rationale for the match. The Rationale may be "Surname spelling identical, Birth date within 4 years, Death date within 6 years". You can then merge the two individuals.

The following graphic shows the Find Duplicates facility set to run against the demonstration GenBase Keipert. The default percentage of 55% has been chosen.

Find Duplicates Facility - Welsh

The result of running against a large GenBase is now shown. There are 874 rows in the grid. The results have been ordered on the last column "Match Percent" so that the greatest percentage match is shown at the start of the grid. The top row is for a Prince of England born in 1513 and another Prince of England born the next year.

Find Duplicates Facility - ordered Welsh

You will see columns for:

Merged - a green tick indicates that you have merged the two individuals.

Individual 1.

Individual 2.

Match Percent - as well as the percentage as a numeral you will see a graphical rendition of the percentage.


You can widen the dialog. You can widen the columns too. For example, widen the Match Percent column to amplify the graphical percentage. Each of the columns can be sorted. Just click on its header.

Click the Compare button to see the two individuals listed side by side. (Alternatively double click on a row.) In this case the Rationale for the match is "Surname spelling identical, Given names spelling identical, Birth date within 1 year, Death date within 1 year, Same sex".

Find Duplicates Facility - 92 percent

When the Compare button is clicked, a number of messages may be shown in a dialog:

Note - The individuals have an Overlapping Lifespan. They do not have a Common Lifespan. If Merged only some of the Duplicate's attributes will be retained. The rest will only be preserved in a Note.

Note - The individuals have a Different Lifespan. They do not have a Common Lifespan. If Merged the Duplicate's attributes will only be preserved in a Note.


As well as seeing the Primary and Duplicate individual you will see towards the bottom of the dialog, in a memo, the Rationale for the match. These phrases give the fundamental reasons accounting for the percentage match.

The Rationale used is based on factors such as:


Given names

Birth date

Death date



You can switch the individuals if you want by clicking on the Switch button. To merge them click the Merge button.

Note - It is possible for the same individual to be reported in the Indiv 2 column. This means that this person is a candidate to be merged with diffrerent individuals in the Indiv 1 column. If you merge this individual and try to merge the same person again no actual merging takes place but the Merged column will have a green tick against this row.


Share |