After Henry's death, Edward ruled from 1547 to 1553 (aged 10 to 16), and was (or his advisors were) Protestant. After his death, Mary (born 1516) ruled from 1553 to 1558, and was vigorously Roman Catholic, trying to undo all the changes of the previous reigns, but by methods that lost her support she might otherwise have had. After her death, Elizabeth (born 1533) ruled from 1558 to 1601, and was a moderate Protestant, attempting so far as possible to avoid conflict with either side. For some years, she succeeded fairly well, and then the Pope decreed (in 1570, I think) that: (1) Roman Catholics in England, who had hitherto been attending the English-language services in their parish churches, must instead receive the sacraments from priests smuggled in from the mainland to say Mass in Latin; and (2) Elizabeth was no lawful monarch, and Roman Catholics had a duty to depose her and replace her with her Roman Catholic cousin, Mary of Scotland. The English government reacted by declaring that the saying of Mass in Latin was treason. The stage was set for more than a hundred years of religious martyrdoms with political undercurrents.
In 1970, the Vatican selected as representatives of a larger group (totalling perhaps three hundred) forty Roman Catholic men and women, both clergy and laity, who suffered death for conscience' sake during the years from 1535 to 1679. Their names are given below, with years of death. Those marked with an asterisk (*) are Welsh, the others English.
Religious Orders (monks, friars, etc.):
Carthusians:
John Houghton, Augustine Webster, Robert Lawrence, 1535;
Brigittine: Richard Reynolds; 1535.
Augustinian friar: John Stone; 1539.
Jesuits:
Edmund Campion, 1581;
Robert Southwell, Henry Walpole, 1595;
Nicholas Owen, Jesuit laybrother, 1606;
Thomas Garnet, 1608;
Edmund Arrowsmith, 1628;
Henry Morse, 1645;
Philip Evans*, David Lewis*, 1679.
Benedictines:
John Roberts*, 1610;
Ambrose Barlow, 1641;
Alban Roe, 1642.
Friar Obervant, John Jones*, 1598;
Franciscan, John Wall, 1679.
Secular Clergy (parish priests not in monastic orders):
Cuthbert Mayne, 1577;
Ralph Sherwin, Alexander Briant, 1581;
John Pain, Luke Kirby, 1582;
Edmund Gennings, Eustace White, Polydore Plasden, 1591;
John Boste, 1594;
John Almond, 1612;
John Southworth, 1654;
John Lloyd*, John Plessington, John Kemble, 1679.
Laymen:
Richard Gwyn*, poet and schoolmaster 1584;
Swithun Wells*, schoolmaster, 1591;
Philip Howard, Earl of Arundel and Surrey, died in prison (poisoned?) 1595;
John Rigby, household retainer of the Huddleston family, 1600.
Laywomen:
Margaret Clitherow, wife, mother, and schoolmistress, 1586;
Margaret Ward, for managing a priest's escape from prison, 1588;
Anne Line, widow, "harborer of priests", 1601.
Link: http://elvis.rowan.edu/~kilroy/JEK/home.html