MacArthur Family
- Discussion board for those researching the name and its application.
- http://genforum.genealogy.com/macarthur/

MacArthur/Munro
- Ancestral database as maintained by Flora Woensdregt.
- http://worldconnect.rootsweb.com/cgi-bin/igm.cgi?db=:1955529

MacArthur Family Tree Project
- Ancestral heritage of Don McArthur including surname study. Global database attempts to unite the various branches of the clan.
- http://mysite.mweb.co.za/residents/net03849/

MacArthur
- Ancestry of General Douglas MacArthur as prepared by Rhonda R McClure.
- http://www.genealogy.com/famousfolks/douglasm/