Did the Rurikids Have Diabetes or Something?

The Grand Dukes of Moscow (not counting one whose birth year was lacking) do seem to have shorter lives than other Medieval Royals (who in turn have shorter lives than other Medieval known non-royal and non-noble people).

First the chronological list (thank you, wikipedians):
[https://en.wikipedia.org/wiki/List_of_Russian_monarchs#Grand_Princes_of_Moscow]

1261 – 4 March 1303		Daniil Aleksandrovich
1281 – 21 November 1325		Yuriy Danilovich
1288 – 31 March 1340 or 1341		Ivan I Daniilovich Kalita
7 November 1316 – 27 April 1353		Simeon Ivanovich Gordiy (the Proud)
30 March 1326 – 13 November 1359		Ivan II Ivanovich the Fair
12 October 1350 – 19 May 1389		Saint Dmitry Ivanovich Donskoy
30 December 1371 – 27 February 1425		Vasily I Dmitriyevich
10 March 1415 – 27 March 1462		Vasily II Vasiliyevich
26 November 1374 — 5 June 1434		Yury II Dmitrievich
1421–1448		Vasiliy Yuryevich Kosoy (the Squint)
22 January 1440 – 27 October 1505		Ivan III Vasilyevich
26 March 1479 – 3 December 1533		Vasili III Ivanovich
25 August 1530 – 28/18 March 1584		Ivan IV Vasilyevich

Then the list in rising values, two versions, depending on what part of year or even what year some of them were born:

27	33	36	38	42	44	47	53	53	53	54	59	65 (higher)
26	33	36	38	41	44	47	51	53	53	54	59	65 (lower)
01	02	03	04	05	06	07	08	09	10	11	12	13

Then the position values, median by quartiles to extremes:

Minimum 26 or 27 years
Lower quartile 38 years
Median 47 years
Upper quartile 53 years
Maximum 65 years.

So, some of the ideas behind short lifespans in the Middle Ages can come from Russian estimates based on these and similar.

Hans Georg Lundahl
Nanterre UL
St Zenon of Verona
12.IV.2019

Veronae passio sancti Zenonis Episcopi, qui inter persecutionis procellas eam Ecclesiam mira constantia gubernavit, et, Gallieni tempore, martyrio coronatus est.

Update, I did not mean type 1 necessarily.