Discover people named William Cassidy
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William ( Bill / Pa ) Edward Cassidy, 1912 - 2001
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William Patrick Cassidy, 1882 - 1968
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William K. Cassidy, 1841 - 1920
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William Hoete Cassidy, 1928 - 1985
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William Henry Cassidy, 1886 - 1968
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William Hoete Cassidy, 1926 - 1985
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William Cassidy, 1884 - 1916
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William Fullerton Cassidy, 1876 - 1953
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William "Billy" Cassidy, 1848 - 1942
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William Patrick Cassidy, 1882 - 1968
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William John Cassidy, 1857 - 1935
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William (James) Cassidy, 1819 - 1906
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William Joseph Cassidy, 1875 - 1957
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William Henry Cassidy, 1886 - 1968
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William Wilson Cassidy, 1833 - 1916
United States Obituary Index from OldNews.com
William L. Cassidy, 1886 - 1966
United States Obituary Index from OldNews.com
William E. (Bill) Cassidy, 1912 - 1979
United States Obituary Index from OldNews.com
William Benn Cassidy, 1857 - 1948
United States Obituary Index from OldNews.com
William Ewart Cassidy, Circa 1891 - 1949
Australia Obituary Index from OldNews.com
William John Cassidy, Circa 1880 - 1934
Australia Obituary Index from OldNews.com
William Cassidy Cassidy, Circa 1883 - 1905
Australia Obituary Index from OldNews.com
William Cassidy, 1836 - 1914
Australia Obituary Index from OldNews.com
William Cassidy in The Evening Vindicator - Oct 23 1889
Newspaper Name Index, USA, Canada, and Australia
William Cassidy in The Salt Lake herald. - Nov 29 1894
Newspaper Name Index, USA, Canada, and Australia
William H. Cassidy in Middlebury register. - May 8 1914
Newspaper Name Index, USA, Canada, and Australia
William Cassidy in Brisbane Courier (QLD) - June 13 1891
Newspaper Name Index, USA, Canada, and Australia
William Francis Cassidy, 1860 - 1943
Rhode Island Deaths, 1850-1946
William Thomas Cassidy, 1877 - 1933
Rhode Island Deaths, 1850-1946
William J. Cassidy, 1867 - 1946
Rhode Island Deaths, 1850-1946
William Joseph Cassidy, 1865 - 1944
Rhode Island Deaths, 1850-1946
William Denning Cassidy, 1878 - 1947
West Virginia, Deaths
William W. Cassidy, 1883 - 1909
West Virginia, Deaths
William W. A. Cassidy, Circa 1885 - 1960
West Virginia, Deaths
William Dunning Cassidy, Circa 1878 - 1947
West Virginia, Deaths
William C. Cassidy, 1889 - 1938
South Carolina, Deaths, 1915-1943
William Cassidy, died 1939
South Carolina, Deaths, 1915-1943
William Cassidy, died 1930
South Carolina, Deaths, 1915-1943
William Wilson Cassidy, 1833 - 1916
Names & Stories in Newspapers from OldNews.com (Minnesota, Wisconsin, Illinois)
William Cassidy, Circa 1813 - 1873
Names & Stories in Newspapers from OldNews.com (Minnesota, Wisconsin, Illinois)
William Cassidy, Circa 1857 - 1891
Names & Stories in Newspapers from OldNews.com (Minnesota, Wisconsin, Illinois)
William Cassidy, died 1894
Names & Stories in Newspapers from OldNews.com (Minnesota, Wisconsin, Illinois)
William Cassidy, 1841 - 1918
Michigan Deaths
William Fredrich Cassidy, 1892 - 1908
Michigan Deaths
William Cassidy, 1865 - 1936
Michigan Deaths
William J. Cassidy, 1883 - 1944
Michigan Deaths
William Francis Cassidy, 1889 - 1945
New York City Deaths, 1866-1948
William Thomas Cassidy, 1888 - 1927
New York City Deaths, 1866-1948
William Joseph Cassidy, 1878 - 1938
New York City Deaths, 1866-1948
William J. Cassidy, 1877 - 1938
New York City Deaths, 1866-1948
William Cassidy, 1853 - 1924
Maryland Deaths
William Cassidy, 1904 - 1924
Maryland Deaths
William Cassidy, 1921 - 2011
Maryland Deaths
William J. Cassidy, 1936 - 1993
Maryland Deaths
William John Cassidy, 1888 - 1954
Arizona Death Certificates
William J. Cassidy, 1907 - 1962
Arizona Death Certificates
William Cassidy, 1851 - 1928
Arizona Death CertificatesWilliam W Cassidy, 1927 - 2003
BillionGravesWilliam Frederick Cassidy, 1932 - 2007
BillionGravesWilliam F. Cassidy, 1910 - 1981
BillionGravesWilliam Joseph (Bill) Cassidy, 1928 - 2006
BillionGraves
William E Cassidy, 1918 - 2012
New Jersey Death Index, 1920-1929, 1949-2017
William F Cassidy, 1913 - 2008
New Jersey Death Index, 1920-1929, 1949-2017
William Douglas Cassidy, 1942 - 2013
New Jersey Death Index, 1920-1929, 1949-2017
William P Cassidy, 1925 - 2015
New Jersey Death Index, 1920-1929, 1949-2017
William Francis Cassidy, 1906 - 1969
Idaho, Deaths and Stillbirths
William Cassidy, 1870 - 1953
Idaho, Deaths and StillbirthsEnter a few names and MyHeritage will build your family tree and deliver new insights about William Cassidy
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- Bill Cassel
- Billy Cassel
- Will Cassel
- Willard Cassel
- Willem Cassel
- Arabic: ويليام كاسيدي (Wīlyām Kāsīdī)
- Irish (Ireland): Liam Cassidy
- Japanese: ウィリアム・キャシディ (Wiriamu Kyashidi)
- Russian: Уильям Кэссиди (Vilyam Kessidi)
- Spanish: Guillermo Cassidy


- USA 38%
- United Kingdom 22%
- Ireland 22%
- Canada 11%
- Australia 6%
- Other 1%
The first name William has its origins in the Germanic elements "wil," meaning "will" or "desire," and "helm," meaning "helmet" or "protection," which together convey the meaning of "resolute protector." This name first appeared in the early medieval period, particularly in regions that are now part of modern-day Germany and France, gaining prominence in England after the Norman Conquest in 1066, largely due to William the Conqueror. Historically, those who bore the name were often associated with leadership and nobility, reflecting the protective and determined qualities implied by its meaning. Variations of the name William can be found across different cultures, including Guillaume in French, Guillermo in Spanish, and Wilhelm in German, each reflecting local linguistic characteristics. The name has remained popular throughout history, often associated with notable figures such as kings, writers, and leaders, further solidifying its esteemed status in various societies.
The last name Cassidy has its origins in Ireland, specifically derived from the Gaelic surname "O'Cathasaigh," which means "descendant of Cathasach," with "Cathasach" translating to "vigilant" or "watchful." This surname is primarily associated with the province of Ulster, where the O'Cathasaigh family was historically prominent. The name reflects characteristics of alertness and guardianship, likely relating to the roles of those who bore it in their communities. Variations of the surname can be found in different regions and cultures, including "Cassady" and "Cassidy" itself, which may differ in spelling but retain similar pronunciations. In the United States and other English-speaking countries, the name has become more widespread, often losing its original Gaelic connotations while still being recognized as a distinct Irish surname. Overall, Cassidy embodies a rich cultural heritage tied to Irish history and identity.
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