Colonel Sir Edward Ion Beresford Grogan, 2nd Baronet, CMG, DSO (29 November 1873 – 11 July 1927) was a British Army officer.
The son of the politician Sir Edward Grogan, 1st Baronet, and his wife Catherine (née MacMahon), daughter of Sir Beresford Burston MacMahon, 2nd Baronet, he was educated at Winchester College and the Royal Military College, Sandhurst, and was commissioned into the Rifle Brigade in 1893.
He commanded the 1st Battalion, Rifle Brigade during the First World War and served at Salonika, being mentioned in dispatches three times and awarded the Distinguished Service Order (DSO) in 1917.
In 1918 he was appointed General Staff Officer Grade 1 (GSO1) with the British Military Mission in Siberia during the Russian Civil War.
[2] In July 1927 he shot himself with his Webley revolver at his seat, Shropham Hall, near Attleborough, Norfolk, after being ill for a long time.