Question: What was the maiden name of the designer of the sign requested by Ted Rogich?

Context paragraphs:
Clarence Dietsch: C. Percival Dietsch (23 May 1881 - 22 Feb 1961), full name Clarence Percival Dietsch, was an American born in New York City and raised in The Bronx, NY, as the youngest child of Morris and the English-born Clara M. Dietsch (maiden name Henry).  Morris and his twin brother Leonard were born in America to Frederick and Margaret Dietsch (maiden name unknown) after they emigrated with other children of theirs from Germany in 1836.

Samuel James Supalla: Dr. Samuel James Supalla was born in Pasco, Washington on December 4, 1957.  "Although, I really think of myself as being born around December 23rd with the help of my brother, Ted!"  His brother Ted had helped with the creation of his name sign, which Samuel did not have till three weeks after his birth.  His name sign is signed with "the /S/ handshape moving from one side of the chin to the other" At a very young age, he began appointing name signs for others.  Both of his parents were deaf and he had three brothers, two deaf and one hard of hearing.  In result, Samuel grew up in a signing and culturally enriched Deaf environment.  Sam Supalla is exceptionally notable for his storytelling performances in American Sign Language (ASL), particularly for his narrative in .  He is as well an accomplished filmmaker.  Dr. Sam Supalla is a Deaf linguist “whose interest lies in the research and English development issues concerning deaf children” and stresses the importance in acquisition of a natural sign language.

Anna Hill Johnstone: Anna Hill Johnstone was an American costume designer who was born in Greenville, South Carolina on April 7, 1913, and grew up in Richmond, Virginia.  Johnstone designed costumes for more than sixty films and received two Academy Award nominations for her work on "The Godfather" and "Ragtime".  In 2006, she was posthumously awarded the Costume Designers Guild "Hall of Fame" award.  Johnstone, whose married name was Robinson, chose to be credited under her maiden name, and was often referred to as "Johnnie."  Johnstone worked with some of the most respected and idiosyncratic American film directors such as Elia Kazan, Sidney Lumet, Frank Perry, Milos Forman, and Francis Ford Coppola.  Some of Johnstone's film credits included "Serpico", "On the Waterfront", "East of Eden", "Baby Doll", "Dog Day Afternoon", "A Face in the Crowd", "The Swimmer" and "The Godfather".

Marianne Appel: Marianne Appel (May 6, 1913 – September 26, 1988) was an American artist and a member of the Woodstock artists colony.  She was also known under the professional name of Marianne Harms in her second career .  She painted murals for the Works Progress Administration (WPA) Fine Arts Section during the Great Depression and was selected for exhibits at the Whitney Museum of American Art, the Art Institute of Chicago, the Corcoran Gallery of Art and has works in the permanent collections of the Metropolitan Museum of Art and the Smithsonian American Art Museum.  She was married to Austin Mecklem from 1936 to his death in 1951, but kept her maiden name professionally until after her second marriage to Carl Harms in 1960, after which she went by Marianne Harms.  Harms became an illustrator and puppet designer, learning her craft working with Bil Baird and then working as a designer and fabricator for Jim Henson on the pilot for The Muppets and numerous of his television specials and movies.

Clara Nordström: Clara Nordström, maiden name and pseudonym for Clara Elisabet von Vegesack, (January 18, 1886 in Karlskrona, Sweden – February 7, 1962 in Mindelheim, West Germany) was a German writer and translator of Swedish descent.  With the themes of her writing and her Swedish maiden name she profited from the German interest for Scandinavian writers.

List of people who adopted matrilineal surnames: This is a list of notable people who have changed, adopted or adjusted their surnames based on a mother's or grandmother's maiden name.  Included are people who changed their legal names and people who created personal or professional pseudonyms. Under longstanding Western custom and law, children are customarily given the father's surname, except for children born outside marriage, who often carry their mother's family names.  However, in the 1970s, some women began to adopt their mother's maiden name as their legal surnames.  People in Sweden have recently begun adopting maternal line surnames in an effort to broaden the number of last names in the country.

Brian Batsford: Sir Brian Caldwell Cook Batsford (18 December 1910 – 5 March 1991) was an English painter, designer, publisher and Conservative Party politician.  Born at Gerrards Cross in Buckinghamshire as Brian Caldwell Cook, he adopted his mother's maiden name, Batsford, in 1946.  As Brian Cook, he was well known as the illustrator/designer of the dust jackets of the highly-collectible Batsford books from the 1930s to the 1950s.

Maiden and married names: When a person (traditionally the wife in many cultures) assumes the family name of his or her spouse, that name replaces the person's birth surname, which in the case of the wife is called the maiden name (birth name is also used as a gender-neutral or masculine substitute for maiden name), whereas a married name is a family name or surname adopted by a person upon marriage.

Betty Willis: Betty Jane Willis (née Whitehead; May 20, 1923 – April 19, 2015) was an American visual artist and graphic designer.  Born in Overton, Nevada, she is best known for having been the designer of the Welcome to Fabulous Las Vegas sign, and has been attributed to being an influencer in defining modern Las Vegas' visual image.

Welcome to Fabulous Las Vegas sign: The Welcome to Fabulous Las Vegas sign is a Las Vegas landmark funded in May 1959 and erected soon after by Western Neon.  The sign was designed by Betty Willis at the request of Ted Rogich, a local salesman, who sold it to Clark County, Nevada.

Supporting paragraphs: Betty Willis Welcome to Fabulous Las Vegas sign
Answer: Whitehead