More Fellowship Connections Are Hiding in Plain Sight in The Rings of Power
The Lord of the Rings: The Rings of Power precedes the events of Peter Jackson's The Lord of the Rings movies by millennia.
Because the series mutilates and compresses Middle-earth's timeline, bringing together events which also were separated by more than a thousands of years in the appendices to the LotR book, the precise time gap is impossible to determine, but it is likely to be huge.
Yet some connections between the series and the films do exist.
Even besides the extremely obvious, such as the titular Rings of Power, and immortal characters like Sauron, Elrond and Galadriel, who managed to survive from the Second Age of Middle earth to the Third.
As at this point only contrarians still argue that the Stranger is anyone but Gandalf, we also have another major character and a member of the Fellowship of the Ring physically present in the series, and his presence also should count as obvious.
Another connection, quite evident even to those who only watched the movies is Elendil and Isildur, distant ancestors of Aragorn, who feature both in the series and in the opening sequence of The Fellowship of the Ring film.
Other connections are less evident.
For example, without carefully reading appendices to The Lord of the Rings, you won't realize that Gimli is a distant descendant of a younger son from the dwarven royal house of Durin, to which King Durin III and Prince Durin from the series belong.
So, here we have another case of a blood relation extending between the ages to connect the films and the series.
And some connections are rather speculative, and based on the tendency of mortal characters from The Rings of Power to be ancestors of mortal characters from the movies, which can be noticed from the examples above.
For example, it is quite possible that some of the Harfoot characters might actually related by blood to some of the Hobbits, who played major roles in The Lord of the Rings, a link stretching across dozens of generations – in fact it is highly possible, as the Harfoot group in the series are clearly meant to be the proto-Hobbits.
And if you go sufficiently far back in time, everyone in a relatively small, insular, nation is likely to be related to everyone else. But in absence of royal genealogies, this cannot be proven or disproven.