That's the challenge. I have used spelling variations of Vyzart, Viser, Visard, etc., examined the usual sites, ancestry.com, genealogy.com, footnote, SSN death index on rootsweb, findagrave, etc. searched other states besides Texas and Oklahoma with no success. Hoping some other researcher might have more information on this line. Considered the family in Brownwood, Texas area, etc.... again no possible match.
This is the only clue: the family lived on a cotton farm in west Texas early 1940s when the Oklahoma sister and cousins visited her sister Viola Vyzart and family and the Vyzart family visited the relatives in south central Oklahoma. The Oklahoma sister died in late 1950's but her sister's family did not attend the funeral.