Mo and Sam were born out of wedlock.
Mo's father is overzealous as Mayor to ensure voter approval from those who won't hold it against him for siring a bastard son.One of Mayor Goldfinger's adversaries tried to use his surname against him.
He does have the same surname as a Bond villain.Mo is meant to be a Good Counterpart to Chloé Bourgeois.
Both characters have a Mayor Dad and a maternal half-sister but Mo had a better upbringing and his powers came from a family legacy instead of a lost source of power.