Władysław I the Elbow-high of Kujawy, however, as he had two older half-brothers from Casimir’s second marriage to Constance of Wrocław: Leszek II the Black ("Leszek Czarny") and Ziemomysł. He was named after his uncle, his mother's brother Władysław, Duke of Opole. Already in contemporary sources he was nicknamed ""Łokietek"", a diminutive of the word "łokieć". It translates as "elbow" or "ell" – a medieval unit of measure similar to a cubit, as in "elbow-high". The origin of this nickname, as resulting from Władysław’s short stature, was explained only in the 15th century by historian Jan Dlugosz. In 1267, when Władysław the Elbow-high was
Ancient Roman units of measurement mean solar day. Although the division of hours into minutes and seconds did not occur until the middle ages, ancient astrologers had a "minuta" equal to of a day (24 modern minutes), a "secunda" equal to of a day (24 modern seconds), and a "tertia" equal to of a day (0.4 modern seconds). Ancient Roman units of measurement were added to the Unicode Standard in April 2008 with the release of version 5.1. The Unicode block for ancient Roman units of measurement, called Ancient Symbols, is U+10190–U+101CF, i.e. in the upper plane: Ancient Roman units of measurement The ancient Roman