Extracts from the Wayne Co., MI, Probate files housed at the Archives of Michigan include (there may be duplicates):
Thierry, Adeline (Renaud) #8313
Sister of estate 1877 --Detroit, Wayne
Was Frederick Renaud living in Grosse Pointe in 1900 and died in 1911? His vital statistics (born in France and at the correct age to be Adeline's brother) match up quite well.