The Research Like a Pro Genealogy Podcast

RLP 395: How to Use Ancestry DNA Custom Clusters in Your Research

10 snips
Feb 2, 2026
They dig into Ancestry Pro Tools' custom clustering for DNA research. The conversation covers choosing target and sidekick matches, setting centimorgan ranges, and saving clusters before they expire. A real-world Cline family test shows how subclusters can clarify relationships. Practical tips include experimenting with combinations and tracking every run in a research log.
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INSIGHT

Custom Clusters Target Specific Lines

  • Ancestry's custom clusters let you target specific ancestral lines by choosing matches and parameters.
  • The tool finds matches who share 65–1300 cM with you and ≥20 cM with each other to form likely-common-ancestor clusters.
INSIGHT

Clusters Speed Distant-Generation Work

  • Custom clusters speed up isolating groups descended from a common ancestor compared with manual shared-match methods.
  • They are especially helpful for detecting patterns in distant generations with small DNA segments.
ADVICE

Save Clusters Immediately

  • Save clusters you care about because they expire after 30 days unless added to a group.
  • Screenshot clusters and add them to named groups to preserve evidence before matches or tests change.
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