Edmond Modeste Lescarbault died in 1894.
Edmond Modeste Lescarbault was born in 1814.
Modeste Carlier died in 1878.
Joseph Modeste Sweeney died on 2000-12-11.
You might be talking about Mercury, if not I'm going to assume you are talking about Vulcan, the hypothetical planet that during the 19th century was believed to exist between Mercury and the sun and was supposed to be the cause of Mercury's unusual orbit. Indeed Edmond Modeste Lescarbault believed he observed its transit in 1859 reports rolled in of sightings of it. But no proof of it's existence was ever found (no predictable orbital perimeters). Today many believe he either observed a sunspot or maybe a comet/asteroid.
Modeste Carlier was born in 1820.
Modeste Mignon was created in 1844.
Mussorgsky died on the 28th March 1881 aged 42
Modeste M'bami was born on 1982-10-09.
Edmond Genet died in 1917.
Edmond Yu died in 1997.
Edmond Crosse died in 1941.
Edmond Laguerre died in 1886.