Looking for siblings Do the names Antrobus or Beneke mean anything ?

We are looking for my husbands sisters and possibly others. If the names Antrobus or Beneke mean anything to anyone,PLEASE fill in the blanks. We know a set of twin girls was put up for adoption,we do not know when they were born.We are guessing 1943-1946 or 1950-1955. These are the years no children we know of was born.If you are out there,your birth mom's name was Ruth (Antrobus) father was Clarence Beneke. You were probably born in the Alton-Woodriver-Jerseyville Illinois area's. First born in 1934 then approx.every 2 years a child was born,the last one in 1957. You have a BUNCH of half and full brothers and sisters. 2 brothers 1 sister last name MONROE,3 brothers (one of wich was given up for adoption and found us) 1 sister last name BENEKE,1 sister and 1 brother last name BROWN. We know there are people that know something so PLEASE PLEASE contact me.We have medical information you need to know. We understand if you do not want to get to know us,we will not press the issue.We would at least like to know your names and if you stayed together and if you had a good life. If you would like to get to know us that would be GREAT!!!!!!!