ok....i counter single parent, with the age-old international definition of maternal bloodline.
mom has to be e stablished citizen.
The Normal rule throughout Western History is "Partus Sequitur Patrem."
Allegiance descends through the Father.
We are Patrialenial in Western cultures. You inherit your Father's name as well as his allegiance.
"Partus Sequitur Ventrem" only applies to unwed mothers where the father is unknown.