No the two actress were not related.
Jean Arthur was born on October 17, 1900 and died on June 19, 1991. Jean Arthur would have been 90 years old at the time of death or 111 years old today.
Jean Arthur died on June 19, 1991 at the age of 90.
Bea arthur is exactly 89 years old her next birthday is on may 13:)
Is bea authur related to bethany frankel