from medieval Latin monticulōsus, from Latin monticulus dim. of monti-, mons mountain
1656 - Glossographia, Thomas Blount;
"Monticulous, full of hills or mountains"
From: The Madras Journal of Literature and Science
Vol. XI, Edited by Robert Cole and C.P. Brown
No. 27, April, 1840
Catalogue of the Birds of the Peninsula of India