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.
Modeste Mignon was created in 1844.
Modeste Carlier was born in 1820.
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 M'bami was born on 1982-10-09.
Mussorgsky died on the 28th March 1881 aged 42
Edmond Hansen died in 1920.
Edmond Brazès died in 1980.
Edmond Holmes died in 1936.
Edmond Slattery died in 1927.