Sielecki is a Polish surname

Surname

A surname is a name added to a given name and is part of a personal name. In many cases, a surname is a family name. Many dictionaries define "surname" as a synonym of "family name"...

, also of one of the noble (szlachta

Szlachta

The szlachta was a legally privileged noble class with origins in the Kingdom of Poland. It gained considerable institutional privileges during the 1333-1370 reign of Casimir the Great. In 1413, following a series of tentative personal unions between the Grand Duchy of Lithuania and the Kingdom of...

) families. It is derived from the village of Sielec, of which many exist with that name in Poland

Poland

Poland , officially the Republic of Poland , is a country in Central Europe bordered by Germany to the west; the Czech Republic and Slovakia to the south; Ukraine, Belarus and Lithuania to the east; and the Baltic Sea and Kaliningrad Oblast, a Russian exclave, to the north...

, Ukraine

Ukraine

Ukraine is a country in Eastern Europe. It has an area of 603,628 km², making it the second largest contiguous country on the European continent, after Russia...

 and Belarus

Belarus

Belarus , officially the Republic of Belarus, is a landlocked country in Eastern Europe, bordered clockwise by Russia to the northeast, Ukraine to the south, Poland to the west, and Lithuania and Latvia to the northwest. Its capital is Minsk; other major cities include Brest, Grodno , Gomel ,...

.

As is typical with Polish surnames, if noble families exist with the same family name but are not related to each other, a coat of arms

Coat of arms

A coat of arms is a unique heraldic design on a shield or escutcheon or on a surcoat or tabard used to cover and protect armour and to identify the wearer. Thus the term is often stated as "coat-armour", because it was anciently displayed on the front of a coat of cloth...

 was assigned to them in order to differentiate between each other. For example the noble (Skrebeciowicz de) Sielecki family of Sielec, Drohobych Raion

Sielec, Drohobych Raion

Sielec is a village about 13.5 kilometers southeast of Sambir within Drohobych district of Lviv province in western Ukraine. The village was founded probably in the 15th century CE....

 were given the right to bear the Sas coat-of-arms.

A person with the surname Sielecki does therefore not necessarily have to be related to each other or even be noble. The Sielecki family from Sielec, Drohobych Raion were Greek catholic as well as Roman catholic, while there are other Sieleckis who are Jewish from places such as Lithuania and Belarus, many of whom live in Argentina

Argentina

Argentina , officially the Argentine Republic , is the second largest country in South America by land area, after Brazil. It is constituted as a federation of 23 provinces and an autonomous city, Buenos Aires...

 and South America

South America

South America is a continent situated in the Western Hemisphere, mostly in the Southern Hemisphere, with a relatively small portion in the Northern Hemisphere. The continent is also considered a subcontinent of the Americas. It is bordered on the west by the Pacific Ocean and on the north and east...

 today.

Notable members

• Leon Ritter von Sielecki, lieutenant of the Imperial and Royal Uhlan Regiment Nr. 13
  Austro-Hungarian Army
  The Austro-Hungarian Army was the ground force of the Austro-Hungarian Dual Monarchy from 1867 to 1918. It was composed of three parts: the joint army , the Austrian Landwehr , and the Hungarian Honvédség .In the wake of fighting between the...
  
   (fell in Tyrawa Wołoska on May 12, 1915)
• Klemens Stefan Sielecki
  Klemens Stefan Sielecki
  Klemens Stefan Sielecki was a Polish engineer and technical director of the first Polish Locomotive Factory Fablok in Chrzanów in the post-war years until 1964....
  
   (1903–1980), engineer
  Engineer
  An engineer is a professional practitioner of engineering, concerned with applying scientific knowledge, mathematics and ingenuity to develop solutions for technical problems. Engineers design materials, structures, machines and systems while considering the limitations imposed by practicality,...
  
   and technical director of Fablok
  Fablok
  Fablok is a Polish manufacturer of steam locomotives, based in Chrzanów. Until 1947 the official name was The First Factory of Locomotives in Poland Ltd. , Fablok being a widely used syllabic abbreviation of Fabryka Lokomotyw. It is now named "BUMAR - FABLOK S.A. "...
  
   locomotives company
• Manuel Sielecki (1909-1998), Polish-born business man in Argentina
  Argentina
  Argentina , officially the Argentine Republic , is the second largest country in South America by land area, after Brazil. It is constituted as a federation of 23 provinces and an autonomous city, Buenos Aires...
  
  http://www.escolar.com/NewsArchives/10/10o/archivo-i6642_esen.shtml
• Hubert Sielecki, Austria
  Austria
  Austria , officially the Republic of Austria , is a landlocked country of roughly 8.4 million people in Central Europe. It is bordered by the Czech Republic and Germany to the north, Slovakia and Hungary to the east, Slovenia and Italy to the south, and Switzerland and Liechtenstein to the...
  
  n artist (born 1946 in Rosenbach, Carinthia
  Carinthia (state)
  Carinthia is the southernmost Austrian state or Land. Situated within the Eastern Alps it is chiefly noted for its mountains and lakes.The main language is German. Its regional dialects belong to the Southern Austro-Bavarian group...
  
  )