The Halappes were connected by marriage with the important Cornish family of Bodrugan. According to settlements made in 1386, Laurence and James Halappe were to have a short-term reversionary interest in the bulk of the Bodrugan estate should Otto Trenewith alias Bodrugan and his wife, Eleanor, fail to produce heirs, and later on James was party to several deeds relating to the property.
In 1403 Halappe was party to a transaction whereby two-thirds of the manor of ‘Pengwenna’ and annual rents of £2 were settled for life on William Tregoose. The whereabouts of his own landed holdings at that time are uncertain, but, after the death of his putative father, he and his wife, along with Laurence’s widow, lived at Tregonian near Truro where, in 1415, all three were together licensed by Bishop Stafford of Exeter to have their own oratory. In his later years he was referred to as ‘esquire’.