Flag created by CincyFlags for the neighborhood. 
Its symbolism, according to CincyFlags in [1]:
"Circle outline representing the loop made by Beechwood and Rose Hill.
A stripe through the middle of the flag for North Avondale’s beautiful curvilinear street layout.
A central blue circle for the Clinton Hills Swim Club, a unifying fixture of the community.
Yellow represents unity and diversity.
Green signifies the prominent foliage.

White as a unifying and reflective element."
Own work using: https://www.cincyflags.com/north-avondale
CincyFlags