Those doubts seem likely to grow after the New York Post reported that Biden has asked an Arkansas judge to prevent his daughter from taking his last name.
Biden fathered the four-year-old girl with a former exotic dancer and only began paying child support in 2020 following a court-ordered paternity test.
However, the Post noted that Biden has since sought to have his child support payments lowered, asserting that there has been a "substantial material change" in his "financial circumstances."
According to the paper, lawyers for the First Son told Circuit Court Judge Holly Meyer that it is not in his daughter's best interests to share the Biden name.
Instead, they argued that the girls, now known as Navy Joan Roberts, can be renamed at some later point when "the disparagement of the Biden name is not at its height."
The attorneys went on to accuse the girl's mother, Lunden Roberts, of engaging in "political warfare" against members of the Biden family as seen from her "disparaging comments" about them.
For her part, Roberts asserts that being known as a Biden would open up otherwise unavailable opportunities for Navy while adding that the Biden family has remained "estranged" from her.
"To the extent, this is misconduct or neglect, it can be rectified by changing her last name to Biden so that she may undeniably be known to the world as the child of the defendant and member of the prestigious Biden family," she said in a court filing.
She added that the Biden name is associated "with being well educated, successful, financially acute and politically powerful."
The Biden family came in for criticism late last year after the New York Post reported that there was no Christmas stocking put up at the White House for Hunter Biden's out of wedlock daughter.
— Megan Basham (@megbasham) November 30, 2021
Daily Caller White House correspondent pointed out that stockings were hung in honor of all other family members, including the pets.
The Biden family excluded the daughter Hunter Biden had out of wedlock from the White House stocking display two years in a row.
— Diana Glebova (@DianaGlebova) November 28, 2022