See Sea

The Deaths in 2019 site lists under September 19:

Koča Pavlović, 57, Montenegrin journalist and politician, MP (since 2006)

• Koča Pavlović (September 17, 1962 – September 19, 2019)

His birthday is an addition to a cluster found in my previous post, expanding it into a:

 “September 1(x2), __, 3,__, 5,..., 8, __, 10(x2), 11, 12, 13, 14, 15, 16(x2), 17, ..., 25, __, 27,__, 29(x2)/ September birthdays of Notable Persons who died In September 2019” pattern cluster 

Bridging one of the gaps.   His date of birth and death generates another cluster:

"September 17, __, 19/Date Sequence" pattern cluster. 

Bridging the gap, and because using the formula as per usual reveals no notable deaths occurring in 1999 or 2000, leaving me to peruse the names for any that stand out: 

• 1964 – Clive Bell, English philosopher and critic (b. 1881)

• 1964 – Seán O'Casey, Irish dramatist and memoirist (b. 1880)

Both died in 1964, butt it's the cryptic phrase in their names: c/see/sea live bell/elle; sea o/eau (water) case. 

• Arthur Clive Heward Bell (16 September 1881 – 17 September 1964)
• Seán O'Casey (born John Casey; 30 March 1880 – 18 September 1964)