Blennerhassett Family Tree
Genealogy one-name study - by Bill Jehan
   Introduction      Key      Key to Dates
 
Key to Dates 
 
 
 
 
 
DATE FORMAT: 
The date format used on this site is day . month . year 
 
OLD STYLE (up to 1752) and NEW STYLE DATES: 
Prior to 1753 a new year in Great Britain, Ireland & colonies commenced on "Lady Day", 25th March, so dates between 1st January & 24th March inclusive fell at the end of a calendar year, not at the beginning (i.e. using the "old style" dates, November 1633 preceded February 1633). For years up to and including 1752, dates from 1st January to 24th March inclusive are shown on this site using both old & new style, e.g. 24-Jan-1633/4, 12-Mar-1715/6, etc.
 
REGNAL YEARS & SAINTS' DAYS: 
Early documents are often dated using the regnal year instead of a calendar year. A regnal year is reckoned starting from the date of a sovereign's accession or anniversary, e.g. Henry VIII became King of England on 22-Apr-1509, therefore the regnal year "30 Henry VIII" is 22-Apr-1538 to 21-Apr-1539.
 
Similarly, the day of the month may be indicated by the name of a church festival (feast or saint's day) held on that day.
For example, a document may be dated "the feast of St.John the Baptist" (29th Aug.) or "the feast of the 11 thousand virgins" (St.Ursula, 21st Oct.)
 
A wonderful source of date conversion tables for regnal years, medieval church festivals, etc is "Handbook of Dates for Students of English History", edited by C.R.Cheney & Michael Jones, published by The Royal Historical Society, London 1945 & Cambridge University Press 1995.
 
 
 
 
"THE ANY YEAR CALENDAR" published by Morton Bros. & Co., London 1921
 SHOWING THE DAY OF THE WEEK FOR ANY GIVEN DATE, 1800-2000.
LEAP YEARS ARE MARKED *
calendar: courtesy of Dorothy Fraser                                                                                                      click on images to enlarge
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
CENSUS DATES: 
England & Wales 
6-Jun-1841, 30-Mar-1851, 7-Apr-1861, 2-Apr-1871, 3-Apr-1881, 5-Apr-1891, 31-Mar-1901, 2-Apr-1911 
Scotland 
7-Apr-1861, 2-Apr-1871, 3-Apr-1881, 5-Apr-1891, 31-Mar-1901, 2-Apr-1911 
Ireland 
31-Mar-1901, 2-Apr-1911 
Canada 
20-Jun to 20-Sep-1825, 1-Jun to 1-Oct-1831, 12-Jan-1852, 14-Jan-1861, 2-Apr-1871, 4-Apr-1881, 6-Apr-1891, 31-Mar-1901 
USA 
2-Aug-1790, 4-Aug-1800, 6-Aug-1810, 7-Aug-1820, 1-Jun-1830, 1840, 1850, 1860, 1870, 1880 & 1900, 15-Apr-1910, 1-Jan-1920, 2-Apr-1930 
  

 

"TITHE APPLOTMENT BOOKS" for Ireland [TAB].
 
Survey years for each county:
 
"Primary Valuation of Tenements" by Sir Richard Griffith, known as "GRIFFITH'S VALUATION OF IRELAND 1847-64" [GV]
Survey years for each county:
Antrim 1824-35 
Kilkenny 1823-40 
Armagh 1825-35 
Laois 1821-43 
 
Leitrim 1829-35 
Carlow 1821-37 
Limerick 1822-35 
Cavan 1824-45 
Longford 1823-35  
Clare 1814-43 
Louth 1823-36 
Cork SW 1824-35 
Mayo 1815-42  
Cork East 1824-34 
Monaghan 1823-34 
Cork NW 1825-34 
Roscommon 1824-53 
Derry 1825-35 
Sligo 1824-36 
Donegal 1825-41 
Tipperary South 1809-46  
Down 1823-41 
Tipperary North 1815-34  
Dublin Co. 1821-46 
Tyrone 1815-34 
 
Waterford 1820-34 
Fermanagh 1824-35 
Westmeath 1803-62 
Galway 1824-50 
Wexford 1823-37 
Kerry 1823-40 
Wicklow 1822-38  
Kildare 1824-42 
 
 
 
Antrim 1861-62 
Kilkenny 1849-50 
Armagh 1864 
Laois 1850-51 
Belfast City 1861-62 
Leitrim 1856 
Carlow 1852-53 
Limerick 1850-52 
Cavan 1856-57 
Longford 1854 
Clare 1855
Louth 1854 
Cork SW  1850-52 
Mayo 1851-57 
Cork East 1851-53 
Monaghan 1858-61
Cork NW 1851-52 
Roscommon 1852-58 
Derry 1858-59 
Sligo 1858 
Donegal 1857-58 
Tipperary South 1850-1 
Down 1863-64 
Tipperary North 1848-52 
Dublin Co. 1848-52 
Tyrone 1858-62 
Dublin City 1854 
Waterford 1848-51 
Fermanagh 1862 
Westmeath 1854 
Galway 1855 
Wexford 1853 
Kerry 1852 
Wicklow 1852-4 
Kildare 1851 
 
 
 
 
REIGNS of NORMAN, ENGLISH & BRITISH MONARCHS 
 
 
House 
Monarch 
nickname 
from 
to 
NORMAN
William I
"the Conqueror"
25-Dec-1066
9-Sep-1087   
 
William II
"Rufus"
26-Sep-1087
2-Aug-1100   
 
Henry I
 
5-Aug-1100
1-Dec-1135   
 
Stephen
 
26-Dec-1135
25-Oct-1154   
PLANTAGENET  
Henry II
 
19-Dec-1154
6-Jul-1189   
 
Richard I
"the Lionheart" 
3-Sep-1189
6-Apr-1199  
 
John
"Lackland" 
27-May-1199
19-Oct-1216   
 
Henry III
 
28-Oct-1216
16-Nov-1272   
 
Edward I
"Longshanks" 
20-Nov-1272
7-Jul-1307   
 
Edward II
 
8-Jul-1307
20-Jan-1327  
 
Edward III
 
25-Jan-1327
21-Jun-1377  
 
Richard II
 
22-Jun-1377
29-Sep-1399  
 
Henry IV
 
30-Sep-1399
20-Mar-1413 
 
Henry V
 
21-Mar-1413
31-Aug-1422 
 
Henry VI
 
1-Sep-1422
      and
Sept/Oct 1470
4-Mar-1461
 
11-Apr-1471
 
Edward IV
 
4-Mar-1461
9-Apr-1483  
 
Edward V
 
9-Apr-1483
25-Jun-1483   
 
Richard III
 
26-Jun-1483
22-Aug-1485  
TUDOR 
Henry VII
 
22-Aug-1485
21-Apr-1509   
 
Henry VIII
 
22-Apr-1509
28-Jan-1547   
 
Edward VI
 
28-Jan-1547
6-Jul-1553 
 
Jane
 
6-Jul-1553
19-Jul-1553   
 
Mary I
 
19-Jul-1553
24-Jul-1554   
 
Philip & Mary (I)
Philip of Spain 
25-Jul-1554
17-Nov-1558  
 
Elizabeth I
 
17-Nov-1558
24-Mar-1603 
STUART 
James I
 
24-Mar-1603
27-Mar-1625  
 
Charles I
 
27-Mar-1625
30-Jan-1649
executed
 
the Commonwealth
Oliver Cromwell
Richard Cromwell
 
Lord Protector
Lord Protector 
 
1649
 
1660  
 
Charles II
 
29-May-1660
this commenced as regnal year 12, counting from date of father's execution
6-Feb-1685  
 
James II
 
6-Feb-1685
11-Dec-1688
 
interregnum 
 
12-Dec-1688 
12-Feb-1689 
 
William (III) & Mary (II)
 
13-Feb-1689
27-Dec-1694
(Mary d.1694) 
ORANGE 
William III (alone)
 
28.-Dec-1694
8-Mar-1702  
 
Anne
 
8-Mar-1702
1-Aug-1714  
HANOVER 
George I
 
1-Aug-1714
11-Jun-1727  
 
George II
 
11-Jun-1727
25-Oct-1760   
 
George III          
 
25-Oct-1760
29-Jan-1820   
 
George IV
 
29-Jan-1820
26-Jun-1830 
 
William IV
 
26-Jun-1830
20-Jun-1837   
 
Victoria
 
20-Jun-1837
22-Jan-1901   
SAXE-COBURG 
Edward VII
 
22-Jan-1901
6-May-1910   
WINDSOR 
George V
 
6-May-1910
20-Jan-1936
Irish Free State 1921 
 
Edward VIII
 
20-Jan-1936
11-Dec-1936   
 
George VI
 
11-Dec-1936
6-Feb-1952
Eire 1937   
 

Elizabeth II

 
6-Feb-1952
 
 
 
  
 

 
 
 
 
 
 
 
 
 
 
 
Key 
 
 
 
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