Macaulay (surname)
Macaulay, Macauley, MacAulay, McAulay and McAuley are surnames of Irish origin originating in Westmeath, Leinster anglicized from Irish Mac Amhalghaidh in the English language. The surname is also found in Scotland of distinct, but related origins due to Irish settling in Scotland. Some of the Irish Macaulay's settled in Scotland during the reign of Robert the Bruce. There are several etymological origins for the names: all of which originated as patronyms in several Gaelic languages—Irish and Scottish Gaelic. Although the English-language surnames are ultimately derived from Gaelic patronyms, the English-language surnames, and the modern  Gaelic-language forms do not refer to the actual name of the bearer's father. Etymology. In some cases, the surnames are derived from the Scottish Gaelic "MacAmhlaidh", or the Irish Gaelic "Mac Amhalghaidh". These Gaelic surnames translate into English as "son of "Amhalghaidh"" or "son of "Amhalghadh"". The Gaelic surnames originated as a patronyms, however they no longer refer to the actual names of the bearer's father's. The personal name "Amhalghaidh" (also spelt "Amhalghadh") is an old Gaelic name whose origin and meaning are uncertain. In other cases, the surnames are derived from the Scottish Gaelic "MacAmhlaibh  or MacAmhlaidh", or the Irish Mac Amhlaoibh. These surnames translate into English as "son of "Amhlaibh""; "son of "Amhladh"" or "son of "Amhlaidh""; and "son of "Amhlaoibh"". The names "Amhlaibh", "Amhladh", "Amhlaidh", and "Amhlaoibh" are Gaelic derivatives of the Old Norse personal names "Áleifr" and "Olaf or Óláfr". Distribution. United States. In 1990, the United States Census Bureau undertook a study of the 1990 United States Census, and released a sample of data concerning the most common names. According to this sample of 6.3 million people (who had 88,799 unique last names), "MACAULAY" (including "Macaulay" and "MacAulay") ranked 12,186th most  common last name, and was borne by 0.001 percent of the population sample. "MCAULAY" ("McAulay") was much less common; it ranked 35,241st most common last name, and was borne by 0.000 percent of the population sample. Within the 2000 United States Census, "MACAULAY" was the 12,764th most common last name, with 2,219 occurrences. "MCAULAY" was the 33,528th most common last name, with only 642 occurrences. The table below shows data concerning racial-ethnic aspects of the surnames in the 2000 United States Census (note that two fields have been suppressed by the United States Census Bureau for confidentiality reasons, since  MCAULAY had fewer than 1,000 people). Scotland. "Macaulay", "MacAulay", and "McAulay" were not amongst the 100 most common surnames recorded in birth, death, and marriage registers in Scotland, in 1995. None of the surnames ranked amongst the 100 most common surnames recorded in birth, death, and marriage registrations in the combined years of 1999, 2000, and 2001. None of the surnames ranked amongst the most common surnames recorded in Scotland, in the United Kingdom Census 1901.