Any genealogical

• names of people
• dates,
• names of settlements

The absence of at least one

Start by asking everyone

The next step could be

Military path of military personnel

To clarify fate

Metric data on births,

Metric period information

Information up to 1790, including

There are also a number

Look for relatives abroad

Archive searches are a thing

Busy people with money can

If the ancestor's surname is rare, then

Ask potential relatives