was there 6 children in her family or 5and were there names alice,willie,mable,eleanor,and daisy if there is another who is he/she?

http://www.girlscouts.org/who_we_are/history/low_biography/

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"Daisy had an older sister named Nellie and four younger sisters and
brothers named Alice, Willy, Mabel and Arthur."

what was everyone in her family

According to the information provided, Daisy had an older sister named Nellie and four younger siblings named Alice, Willy, Mabel, and Arthur. So, everyone in her family includes Daisy, Nellie, Alice, Willy, Mabel, and Arthur.