The actual etymology of the name is unknown;
it derives from a medieval exonym applied to a people of the Transoxania region, used to refer to either "Arabs" or "Persians"; according to the Library of Congress's 1997 Country Study of Tajikistan, it is difficult to definitively state the origins of the word 'Tajik' because the term is "embroiled in twentieth-century political disputes about whether Turkic or Iranian peoples were the original inhabitants of Central Asia."
Library of Congress Call Number DK851 .K34 1997.
The supposed connection of Tajik with tajvar "crowned" can be traced to 1990 (Echo of Islam, Issues 183-193, Ministry of Islamic Guidance, 2000, p. 54). The flag design being based on this etymology was reported in Alfred Znamierowski, The world encyclopedia of flags, Hermes House, 2002, p. 169.
Embassy of Tajikistan to Belgium State SymbolsArchived 2016-05-01 at the Wayback Machine "The crown and a star are entered in a rectangle, the sides of which on a vertical make 0,8 and across 1,0 width of a white stripe. Five-pointed stars are entered in a circle with diameter 0,15 and settle down on an arch radius of 0,5 width of a white stripe. There are three colors on a flag of the Republic of Tajikistan: green, red and white. A green stripe are valleys, they are not enough in republic - 7 % of territory. Because the rest of the territory is occupied by mountains. The white stripe is a color of the main richness of republic - cotton and also the color of snow and ice in high mountains. The red color is a color of unification of republic and brotherhood with other nations of the world."
Embassy of Tajikistan to Belgium State SymbolsArchived 2016-05-01 at the Wayback Machine "The crown and a star are entered in a rectangle, the sides of which on a vertical make 0,8 and across 1,0 width of a white stripe. Five-pointed stars are entered in a circle with diameter 0,15 and settle down on an arch radius of 0,5 width of a white stripe. There are three colors on a flag of the Republic of Tajikistan: green, red and white. A green stripe are valleys, they are not enough in republic - 7 % of territory. Because the rest of the territory is occupied by mountains. The white stripe is a color of the main richness of republic - cotton and also the color of snow and ice in high mountains. The red color is a color of unification of republic and brotherhood with other nations of the world."