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Alastair Denniston

British cryptographer and Royal Navy Commander (1881-1961)

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Occupation

British cryptographer and Royal Navy Commander (1881-1961)

Born in

Greenock

Born

December 1, 1881

Zodiac

Sagittarius

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28,885

days lived

79

age at death

Born
December 1, 1881 in 🇬🇧Greenock
Died
January 1, 1961 in Lymington (aged 79)
Zodiac
♐︎Sagittarius·snake 🐍
No cited sources yet·8 dated events·Partial archiveUpdated Jul 2026

Birth Chart

Natal Chart

Alastair's Birth Chart

Astrology
♈︎♉︎♊︎♋︎♌︎♍︎♎︎♏︎♐︎♑︎♒︎♓︎☉☽☿♀♂♃♄⛢♆♇
Fire
Earth
Air
Water
☉

Sun Sign

Sagittarius♐︎

☽

Moon Sign

Aries♈︎

Dominant Element

Fire

⚠️ Rising sign requires birth time for accurate calculation

Planetary positions calculated for December 1, 1881

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⚡ Timeline
8 dated eventsPartial archiveUnsourced
1961
Day 28,885
Age 79

Death

Jan 1, 1961

Alastair Denniston dies in 1961.

1919
Day 13,544
Age 37

Joins Government Code and Cypher School (GC&CS)

Jan 1, 1919
1918
Day 13,179
Age 36

Forms a codebreaking team

Jan 1, 1918

Forms a codebreaking team with William Clarke and Nigel de Grey.

1917
Day 12,814
Age 35

Works in Room 40

Jan 1, 1917
1914
Day 11,718
Age 32

Commissioned as a Commander

Jan 1, 1914

Commissioned as a Commander in the Royal Navy.

1903
Day 7,700
Age 21

Joins the Royal Navy

Jan 1, 1903

Joins the Royal Navy.

1900
Day 6,605
Age 18

Studies at University

Jan 1, 1900

Attends university, studies languages.

1881
Day 0
Age 0

Born

Dec 1, 1881

Alastair Denniston is born.