In article , Robert Casey
writes:

Back in the olden days, two brothers living at the same house
got their ham licenses. But the FCC, seeing the same address,
made them share the same callsign, as they shared the same shack.

When was this, Robert?

I know of two brothers with licenses who lived at the same address and had two
different callsigns - more than 30 years ago.

Going back into the 1950s, I've read of husband-and-wife hams at the same
address with different callsigns.

So it would go back to pre-1950 or so.

More fun facts:

At the start of WW2, the FCC cancelled all amateur radio station licenses, and
stopped issuing new ones. But you could still get an amateur radio operator
license - there were just no legal amateur stations where you could use it.

For many years, FCC and its predecessors would allow the same individual to
hold multiple station licenses. This was fairly common back when portable
operation required you to identify as such, and when you had to notify FCC if
you operated away from home for more than 48 hours. Hams with a second
residence, or who went away to the same place regularly, sometimes got second
station licenses to avoid all that. Here in EPA, where it's common for
well-to-do hams to own places "down the shore" in SNJ, more than a few hams
held two station licenses - one with a 3-land call and one with a 2-land call.
When those old rules changed, one of those calls had to be given up.

73 de Jim, N2EY