Two Donald Trumps are better than one.

Oncologist Dr. Donald L. Trump knows and likes his more famous namesake, despite the grief he catches because of the shared moniker.

“The most distressing comments are when someone starts laughing or when someone at airline security doesn’t believe that’s my name,” said Dr. Trump, who moved from Buffalo to northern Virginia in January.

Mogul Trump, 69, met Dr. Trump, 69, in Buffalo in the 1980s after the doctor wrote to the real-estate titan to see if they were related. (They’re not.)

When Dr. Trump was the director of the Roswell Park Cancer Institute in Buffalo, The Donald approached him to treat a friend’s sick child.

Dr. Trump later asked him to participate in the hospital’s Goin’ Bald for Bucks 2010 fund-raising campaign — which involved shaving your head for donations.

Trump the mogul refused to trim his iconic mane — but did donate $30,000.

Dr. Trump doesn’t think his life will change if Trump stays in the presidential race.

“It may continue to stimulate purportedly humorous comments,” Dr. Trump said.

“But I haven’t heard anything clever for a long, long time.”