Sellers 3: Piers, Pedro, Peter

continuing on we left off with a "March 31(x2)" pattern-cluster.  So in looking for a 3rd, we venture to the March 31 wiki page and from there we use the formula, taking into consideration as well, the "Off By One" curve ball.  The formula helps us to limit our search: investigating only the Deaths Section and then only those who died during  a year with 3 identical numbers at the end ie 1999 and 2000.  And the "one off" curve ball means we need to investigate 1998 and 2001:

• 1998 – Bella Abzug, American lawyer, activist, and politician (b. 1920)

• 1998 – Tim Flock, American race car driver (b. 1924)

• 1998 – Joel Ryce-Menuhin, American pianist (b. 1933)

• 1999 – Yuri Knorozov, Russian linguist and ethnographer (b. 1922)

• 2000 – Giani Chet Singh, Indian scholar (b. 1902)

• 2001 – David Rocastle, English footballer (b. 1967)

The surname Flock and Singh (sing) stand out due to the recent "Bird Theme" pattern-cluster.
Note from their wiki pages:

• Bella Savitsky Abzug (July 24, 1920 – March 31, 1998)
• Julius Timothy "Tim" Flock (May 11, 1924 – March 31, 1998)
• Joel Ryce-Menuhin (June 11, 1933 – March 31, 1998) 
• Yuriy Valentinovich Knorozov (November 19, 1922 – March 31, 1999) 
• Giani Chet Singh (31 March 1902 – 31 March 2000)
• David Carlyle Rocastle (2 May 1967 – 31 March 2001)

As you can see, Singh died on his birthday, expanding the cluster.  And we also have another 2 May, note from my previous post:

• Mark Cutifani (born 2 May 1958)

And we have a "May 11, June 11/11th Day, Month Sequence" pattern-cluster.   Using the formula again, note from the July 11 wiki page:

• Panagiotis Kondylis (17 August 1943 – 11 July 1998)
• Helen Forrest (April 12, 1917 – July 11, 1999)
• Romke Jan Bernhard Sloot (27 August 1945 – 11 July 1999)
• Pedro Julio Mir Valentín (3 June 1913 – 11 July )
• Robert Alexander Kennedy Runcie (2 October 1921 – 11 July 2000)
• Hermanus "Herman" Brood ( 5 November 1946 – 11 July 2001)

We have a second Pedro and since Piers is also a form of Peter that gives us a "Peter (x3)" pattern-cluster.   AND, we have two more additions to the "Bird Theme" pattern-cluster : Brood and Forrest.  

On the May 2 wiki page one also jives:

Robert Arthur (Robin) Humphreys (6 June 1907 – 2 May 1999)

His nickname "Robin" is another addition to the "Bird Theme" pattern-cluster.  Since we also have a "Christmas Theme" pattern-cluster in the works, I'm reminded of Christmas birds... two turtle doves, 3 french hens, 4 calling birds... and a partridge in a pear tree.  Note from the 12 Days of Christmas wiki page:

• The standard tune now associated with it is derived from a 1909 arrangement of a traditional folk melody by English composer Frederic Austin

Note from Austin's wiki page:

• Frederic Austin (30 March 1872 – 10 April 1952)   

We now have a "March __, 30, 31" and "April 10, __, 12" Date Sequence pattern-clusters.