Here is an excerpt from a book, the earliest known (that I know of, as of 02 Nov 2008) published use the name 'Mount Bonnell':
= = "Four miles above the city, upon the east side of the river, is a high peak, called Mount Bonnell. From the top of the mountain there is a perpendicular precipice of seven hundred feet down to the water. The prospect from the top of this mountain, is one of the grandest and loveliest in nature. On the north and west extend the mountain peaks, rising in bold magnificence hill above hill, for a distance of twenty miles. And though what are here called mountains, would be in many countries be looked upon as inconsiderable hills, they form a bold contrast to the flower clad prairie, which stretches off to the south and east as far as the eye can extend. The Colorado river is seen for the distance of fifteen miles winding its course among hills and rich valleys; below us is the infant city, which completes the prospect and renders it one of the loveliest upon earth." = =
This was published on/about April, 1840, so the 'name' must have been in use before the book's writing-date, not just the publication-date.
This author, although providing many details and observations concerning Mount Bonnell, did not provide the source of the 'name'.
Later books, such as the one referenced in your response, written in 1956, seem to be repeating the 'traditional and assumed namesake' of George W Bonnell.
But where did the 'name' truly come from?? What is the 'proof' it was for George W Bonnell?? This is what we want to find.
I can see the assumption being made: a landmark with the name of Bonnell is in Austin, and there was a resident in Austin with the name of Bonnell - a conclusion, not uncommon in genealogy, is that the landmark was named after the landowner - or someone close by.
And at times, this type of an assumption may be true, IF no other person with the same name was ever involved.
Without seeing a more detailed explanation, I don't know how, if the author of this 1840 book did not reveal the namesake, that a later book, in 1956, could.
Reference for the 1840 Book excerpt used above: "Topographical Description of Texas, to Which is Added an Account of the Indian Tribes" by Geo. W. Bonnell, AUSTIN: Published by Clark, Wing, and Brown. 1840. (yes, the same person) http://www.kbsb.com/reward/gwb_book.htmhttp://www.kbsb.com/reward/gwb_book.htm