Hennadiy (Ukrainian: Геннадій) is a Ukrainian given name. Like the Russian variant Gennady it is derived from Gennadius. Notable people with the name include:
Hennadiy Altman (born 1979), Ukrainian football goalkeeper
Hennadiy Avdyeyenko (born 1963), Ukrainian high jumper
Hennadiy Krasylnykov (born 1977), Ukrainian weightlifter
Hennadiy Lytovchenko (born 1963), Ukrainian footballer and football coach
Hennadiy Medvedyev (born 1975), Ukrainian footballer
Hennadiy Moroz (born 1975), Ukrainian footballer
Hennadiy Orbu (born 1970), Ukrainian footballer
Hennadiy Perepadenko (born 1964), Ukrainian footballer
Hennadiy Popovych (1973–2010), Ukrainian footballer
Hennadiy Udovenko (born 1931), Ukrainian politician and diplomat
Hennadiy Zubov (born 1977), Ukrainian footballer