Royal Blood was a database that said (in March 2011) that it "was home to the world's largest single published family tree that was freely available online". It invited people to submit a GEDCOM for incorporation then "watch the page for news of the next version coming later in 2010". It also said "To comply with privacy regulations worldwide we have removed anyone from the tree who is likely to be living."

((The publishers of might question the first claim.)

The index key did not strictly search for surnames. For example, the first nine pages listed in a search under "F" on 27 March 2011 were:

? F.A.Burguin
Matthew Dawes F.G.S.
William Horton Lloyd F.L.S.
R. Nasmyth Esq. F.R.C.S.E.
? F.R.Marbot
Erasmus Darwin M.D. F.R.S.
Samuel Galton F.R.S.
George Allan F.S.A.
Jacob F.Walker

There was no finer division of letters, so if your target name started with "Fo", for example, you needed to use your scroll block to work quickly through tens of thousands of entries.

When you reached an individual's page, you'd see the name "Royal Ancestry File" and the greeting "Welcome to the largest genealogical tree on the internet with over 1.4 million indivduals.[sic] below The figures in square brackets showed the number of relationships required to connect to Charlemagne."

The page had several panels below the heading:

  1. Google ads
  2. Basic data: name, birth, christening, marriage, death, burial, sex
  3. Ancestry tree
  4. Children (with an indication of how many children each child had)
  5. Comments (which may be submitted by anyone)