Question: What is the birth date of one of the people baptized in Saint Aidan's Church and Rectory who is seen as an icon of modern American liberalism?

Context articles: Saint David
Saint Aidan's Church of England High School
Modern liberalism in the United States
Political ideologies in the United States
Emmett Cottage
Frank E. Butler
Robert F. Kennedy
St. Aidan's Church (Brookline, Massachusetts)
Old Rectory (Perrowville, Virginia)
Saint Michael the Archangel Church (Monroe, MI)

Saint David (Welsh: Dewi Sant , Latin: "Davidus" ; 500 c. 589) was a Welsh bishop of Mynyw (now St Davids) during the 6th century; he was later regarded as a saint.
 He is the patron saint of Wales.
 David was a native of Wales, and a relatively large amount of information is known about his life.
 However, his birth date is uncertain: suggestions range from 462 to 512.
 He is traditionally believed to be the son of Saint Non and the grandson of Ceredig ap Cunedda, king of Ceredigion.
 The Welsh annals placed his death 569 years after the birth of Christ, but Phillimore's dating revised this to 601.
Saint Aidan's Church of England High School (formerly Saint Aidan's Church of England Technology College) is a Church of England voluntary aided school located in Preesall (near Poulton-le-Fylde), England.
 In its most recent Ofsted report in 2013, the school was rated Grade 2 (Good) overall and Grade 1 (Outstanding) for Behaviour and Safety.
 They are well-known within the local community, and are notable as having above-average GCSE results and an outstanding approach to health and safety.
 St Aidan's are responsible for the schooling of Barney Harwood, a well-known CBBC presenter.
 The school also boasts having a highly effective Christian ethos which teaches students impeccable social moral responsibilities and behaviours.
Modern American liberalism is the dominant version of liberalism in the United States.
 It is characterized by social liberalism, and combines ideas of civil liberty and equality with support for social justice and a mixed economy.
 The term "modern liberalism" in this article refers only to the United States.
 In a global context, this philosophy is usually referred to as social liberalism.
Political ideologies in the United States refers to the various ideologies and ideological demographics in the United States.
 Citizens in the U.S. generally classify themselves as adherent to positions along the political spectrum as either liberal, progressive, moderate, or conservative.
 Modern American liberalism aims at the preservation and extension of human, social and civil rights as well as the government guaranteed provision of positive rights.
 It combines social progressivism and to some extent, ordoliberalism and is highly similar to European social liberalism.
 American conservatism commonly refers to a combination of economic liberalism and libertarianism, and to an extent, social conservatism.
 It aims at protecting the concepts of small government and individual liberty, while promoting traditional values on some social issues.
Emmett Cottage is a historic cottage at 217 Freeman Street in Brookline, Massachusetts, directly behind Saint Aidan's Church and Rectory.
 Of uncertain construction date but stylistically dated to the 1840s, it is a little-altered example of a small Gothic Revival cottage.
 It was listed on the National Register of Historic Places on October 17, 1985.
Francis E. Butler (January 30, 1847 (baptized)November 21, 1926) was an Irish American marksman, in Wild West variety shows.
 He was married to sharpshooter Annie Oakley.
 While his birth date is listed on his and Oakley's U.S. passport application as February 25, 1852, the obituary for Butler posted by the Associated Press in 1926 has his age as 76, which would mean he was born in 1850.
 According to baptism registers on file at the National Library of Ireland, Butler was baptized on January 30, 1847.
 His parents were Michael Butler and Catherine Whelan.
 He was the oldest of their five children.
Robert Francis "Bobby" Kennedy (November 20, 1925 – June 6, 1968) was an American politician and lawyer from Massachusetts.
 He served as the United States junior senator from New York from January 1965 until his assassination in June 1968.
 He was previously the 64th U.S. Attorney General from January 1961 to September 1964, serving under his older brother President John F. Kennedy and his successor, President Lyndon B. Johnson.
 Kennedy was a member of the Democratic Party, and is seen as an icon of modern American liberalism.
Saint Aidan's Church and Rectory is a historic Roman Catholic church complex in Brookline, Massachusetts.
 The stuccoed church, located at 207 Freeman Street, was designed by Maginnis & Walsh, a noted designer of ecclesiastical buildings, in the Medieval (Tudor) Revival style, and was built in 1911.
 It was Brookline's third Catholic parish, after Saint Mary's and Saint Lawrence.
 The church is notable as the parish which was attended by Joseph P. Kennedy and his family when they were living on Beals Street; it was the site of the baptism of both John F. Kennedy and Robert F. Kennedy.
 The rectory, located at 158 Pleasant Street, was built c. 1850-55 by Edward G. Parker, a Boston lawyer.
 It was acquired by the church in 1911, and restyled to match the church in 1920.
Old Rectory of St. Stephen's Episcopal Church is a historic Episcopal church rectory located near Perrowville, Bedford County, Virginia.
 It was built in 1787, and is a "T"-shaped frame dwelling with exterior end chimneys and a gable roof.
 It features a modern one bay, two-story portico supported by four fluted Doric order columns.
 From around 1828 to 1904, the house served as the rectory of St. Stephen's Episcopal Church.
Saint Michael the Archangel Church (St. Michael Church) is located on the west side of the city of Monroe, Michigan along the River Raisin.
 It is home to 1,200 families and it is one of most important religious institutes in Monroe County.
 It was founded in the year 1852.
 The present building was built from 1866-1867.
 It is in the Archdiocese of Detroit.
 Its current priest is Rev. Phillip Ching.
 When the parish was first established, the mayor of Monroe palatial residence was remodeled as a temporary church.
 It was used as a church on the first floor and on the second it was used for the school.
 Later it would only be used as St. Michael School.
 Then in 1866 the cornerstone for the present church was laid.
 The large 187 foot steeple wasn't added until 1883.
 In 1874 the 3-story rectory was built east of the church.
 In 1918 the parish built the present building of St. Michael School which is now a part of Monroe Catholic Elementary Schools.
 The movement to establish the parish started in 1845 by 14 German immigrants who wanted to worship in their native language.
 The only nearby church was St. Mary of the Immaculate Conception right across the river where St. Michael stands today.
 St. Mary's only worshiped in French and wouldn't hold services in other languages like German and Irish.
 The German and Irish families were forced to move to the second floor of the rectory to have mass in their native languages.
 When the German families were able to acquire land they were eager to leave St. Mary's to start a parish of their own.
 They first purchased an empty lot Humphrey Street but the plan was soon abandoned.
 They then purchased the first mayor of Monroe's estate to build the church and it remains the current site of the church.