The title of Mormaer designates a regional or provincial ruler in the medieval Kingdom of the Scots. In theory, although not always in practice, a Mormaer was second only to the King of Scots, and the senior of a toisech.

The etymology is variously debated as "Great Steward" (incorporating Gaelic and Picto-Latin), or "Sea Lord" (perhaps defenders against Vikings). Historians do not know if the institution was Gaelic or Pictish. It is notable mormaer occurs only in the post-Pictish period, so it is difficult to sustain any argument for Pictish origins. There is also debate whether mormaer was simply the east-coast equivalent of kinglet (Gaelic: ruirí or rí). For the earliest periods, there is uncertainty about the exact difference between a mormaer and a toisech (Modern Scottish Gaelic tòiseach 'chief'). The earliest Scottish Latin sources use thanus (thane) for toisech. This word was adopted from the Anglo-Saxon lands to the south. It is possible both thanus, comes, mormaer, and toisech, all originally meant similar things, or at least were not part of a stratified hierarchy.

Ramón Luis Ayala Rodríguez (born February 3, 1977), known artistically as Daddy Yankee, is a Latin Grammy Award-winning Puerto Rican reggaeton recording artist. Ayala was born in Río Piedras, the largest district of San Juan, where he became interested in music at a young age. In his youth he was interested in baseball, and aspired to become a Major League Baseball player. He was unable to continue this sport when he received an injury to one of his legs, leaving him unable to walk correctly. He then became involved in the underground rap movement that was in its early stages in Puerto Rico, later to be called reggaeton. After receiving lessons from several artists within the genre, he developed an independent career, first recording in a production titled Playero 37. After this he began to produce independent albums. His first solo album was No Mercy. He subsequently formed a duo with Nicky Jam, and then continued his solo career with the releases of El Cartel and El Cartel II. This led him be one of many pioneers of the reggaeton genre earning him the nickname "El Cangri".