“Grand Prairian” is the name of an inhabitant of Grand Prairie, Texas. The name “Grand Prairiean” has been cited in print since at least 1909 and “Grand Prairian” since 1923.
Wikipedia: Grand Prairie
Grand Prairie is a city in Dallas, Ellis, and Tarrant counties in the U.S. state of Texas and is a part of the Mid-Cities region in the Dallas–Fort Worth metroplex. Grand Prairie is a suburb of both Dallas and Fort Worth and had a population of 175,396 at the 2010 census.
26 November 1909, Grand Prairie Texan (Grand Prairie, TX), pg. 1:
Grand Prairie Invited
The following letter is self-explanatory:
Arlington, Texas, Nov, 24, ‘09
We assure all Grand Prairieans courteous treatment, fair dealing, and a hearty welcome
(W. T. Thurman, Secretary-Treasurer of the Tarrant County Poultry Association—ed.)
10 October 1923, Grand Prairie Texan (Grand Prairie, TX), pg. 1, col. :
GRAND PRAIRIAN TRADES
FOR MANY GERMAN BONDS
6 November 1936, Grand Prairie Texas (Grand Prairie, TX0, pg. 1, col. 1:
Today is Grand Prairie Day at the big Texas Centennial Exposition. Every Grand Prairian should attend the big show and talk Grand Prairie.
29 January 1937, Grand Prairie Texan (Grand Prairie, TX), pg. 1:
Build to that end and possibly Grand Prairians will have no further kick to make.
17 May 1953, Dallas (TX) Morning News, “Letters from Readers,” pg. 4, pg. 2, col. 3:
Your repulsive cartoon, Mr. Knott, although actually funny to Grand Prairians, tends to prove only one point: That “Big D” can dish it out but can not take it.
Historic Grand Prairie:
An illustrated history
By Kathy A. Goolsby; Grand Prairie Historical Organization
San Antonio, TX: Historical Publishing Network
When they weren’t worrying about boll weevils, weather and warts, Grand Prairians were entertaining themselves with ice cream and watermelon suppers.