Sheila and Robert Allen, of Bel Air, have announced the engagement of their daughter, Claire Elizabeth, to Jonathan Whittet Arend, of Hanover, Mass. The bride to be graduated with a Bachelor of Science degree in mathematics from Providence College of Rhode Island in 2007 and from Johns Hopkins University in 2011 with an Master's degree in computer science. She works at AMSAA on Aberdeen Proving Ground. The prospective groom graduated in 2006 with a Bachelor of Arts degree in English from Providence College and in 2007 and 2009 with an MAT and an MA, respectively, in the classics from Tufts University. He is a teacher in Baltimore County. An October wedding in Baltimore is planned.