WASHINGTON (AP) — In targeting Vladimir Putin’s adult daughters with sanctions over Russia’s invasion of Ukraine, the Biden administration ripped aside the privacy Putin has long maintained over his closest ties — avoiding mention of the two women’s full names in public, and most other references to them as well.

The sanctions imposed on immediate family members of Putin and other Russian oligarchs also showcase improved techniques of the U.S. and its allies targeting individuals for financial penalties.

In Russia in particular and in autocracies around the world, sanctioning family members is often essential to making sure financial penalties have the desired punch. Powerful and wealthy leaders often employ the tactic common to many tycoons of putting assets under the names of spouses, children and others.

“We generally want to hold accountable those who have enriched themselves at the expense of the Russian state and elevated their family members into some of the highest positions of power in the country,” said Morgan Finkelstein, a spokesperson for the Treasury Department.

“But also, we know that oligarchs and other sanctioned elites often try to move money or hide assets via family members or other associates,” she said.

The U.S. announced Wednesday that it would target the assets of Putin daughters Katerina Vladimirovna Tikhonova and Maria Vladimirovna Vorontsova.

Bill Browder, an influential longtime campaigner for sanctions over Russia’s human rights abuses, said the move was “sort of an obvious thing, particularly in … the Russian kleptocratic system.”

“You can’t just sanction the principal, you have to sanction the family because the family owns a lot of the assets of the principal,” Browder said. “We’ve seen this in so many different cases now.”

In the case of Putin, expanding what are already thousands of Western sanctions over Russia’s war to include Putin’s family may sting him personally, but not prove much of a threat to his wealth.

Putin — no stranger to fears of concerted Western moves against him — is believed to have taken care to have stashed much of his estimated $200 billion or more with the Russian oligarchs he helped enrich, says Browder, whose decades-long campaign has reshaped the U.S. global sanctions regime overall.

Sanctions against oligarchs’ family members started to ramp up in early March, when the U.S. specifically targeted wives and daughter of oligarchs. Oil executive Nikolay Tokarev’s family members — including his wife, Galina Tokareva, and daughter, Maiya Tokareva — were said to have benefited from his proximity to Putin and the Russian government and were also hit by the sanctions. Maiya Tokareva’s real estate empire in Moscow has been valued at more than $50 million, according to Treasury.

One reason family members are increasingly being targeted is that recently passed anti-money-laundering legislation helps federal officials unveil the true owners of property.

The targeting of family members goes both ways.

Russia recently imposed a travel ban on President Joe Biden’s son, although that was seen as more of a symbolic insult, at most.

White House press secretary Jen Psaki was dismissive in comments to reporters after Russia imposed its travel ban in mid-March against administration officials, as well as Hunter Biden and Hillary Clinton. “It won’t surprise any of you that none of us are planning tourist trips to Russia,” she said.

The Biden administration and administrations before it have included children and spouses of other countries’ leaders in sanctions. That includes Biden administration sanctions against family members of military officers in the 2021 coup in Myanmar, and Trump administration sanctions against the son of Venezuelan President Nicolás Maduro.

Kim Richard Nossal, a political science professor at Queen’s University in Ontario, said financial penalties against children of the wealthy and powerful were in a special category of ethical considerations.

“Generally speaking, if my father commits a crime, it’s always wrong to punish me,” Nossal said. “But if my father commits a crime and I benefit from it, most people would say it’s entirely appropriate for the community to limit the benefits I get from someone else’s wrongdoing.”

“I think most people would say the onus is on the family member to demonstrate they have not benefited from the proceeds of the person being targeted,” he said.

The U.S. sanctioned Putin himself soon after he launched the invasion. Wednesday’s new measures also target the wife and children of Russian Foreign Minister Sergey Lavrov, Putin’s main defender to the world, who had already been named in the U.S. sanctions over the invasion.

Lavrov’s 26-year daughter is reported by British press to have lived a lavish life in London, including buying a multimillion-dollar apartment in cash.

Putin stressed the value of discretion in one of his few public mention of his own daughters.

“I never discuss my family with anyone.” Putin told reporters at a 2015 news conference, according to the BBC.

“Every person has a right for their fate, they live their own life and do it with dignity,” he added.

Putin married Lyudmila Shkrebneva in the 1980s when he was a KGB agent and she was an Aeroflot flight attendant. They divorced three decades later.

Oldest daughter Maria is a medical researcher focusing on the endocrine system of children. She’s also reportedly a businesswoman and developer.

Younger daughter Katerina was a competitive dancer turned tech developer, appearing publicly at performances and in occasional tech conferences.

Left unsanctioned by the U.S. so far is the woman named in news reports as Putin’s longtime romantic partner. Photos from public appearances document years of Putin beaming at Alina Kabaeva, an Olympic gymnast in her youth, as he hands her bouquets or state honors.

Kabaeva in later years became a lawmaker in the Duma and later a board member of a Russian national media company, whose news outlets have promoted Russia’s invasion of Ukraine. As British tabloids noted, Kabaeva’s photo and name disappeared from the website of the National Media Group this week, as sanctions on Putin’s intimates neared.

Imprisoned Russian rights campaigner Alexey Navalny urged sanctions against Kabaeva in a tweet from his cell this week, saying one of the news outlets under her authority was taking the lead in portraying Western accusations over the Russian invasion as an orchestrated campaign of disinformation.

Asked about any planned sanctions on Kabaeva, a senior administration official said it was still an option and that more sanctions on Russian elites close to Putin and their family members were possible. The official spoke on condition of anonymity to discuss internal considerations.

Putin is thought to have been careful to hide away his wealth with Russia’s oligarchs, businesspeople obligated to the Russian leader for enabling and allowing their prosperity, often with the help of Russia’s government and resources, noted Browder.

That makes piling on more sanctions against oligarchs essential. But hitting Putin’s closest personal figures with sanctions will sting, too.

“He was living in this world where everybody was tiptoeing around him,” Browder said. “And now the West is sort of fully ignoring his sensitivities and going for the jugular. And I think that that’s a good thing.”