Not all of these counties show the name as Glasby, here is a list of the counties with the different spellings you will find. The dates are of the earliest refs to that particular spelling.
| Bedford | Glisbey 1873 | ||||
| Berkshire | Glassby 1731 | ||||
| Buckingham | Gliseby 1835 | ||||
| Cornwall | Glasby 1755 | ||||
| Cumberland | Glasbey 1850 | Glasby 1682 | Glassby 1728 | Glaspy 1810 | Glisby 1666 |
| Glosby 1666 | |||||
| Derby | Glasby 1786 | Glassby 1825 | Glazby 1838 | ||
| Devon | Glasby 1717 | Glassbey 1770 | |||
| Durham | Glasby 1625 | Glassby 1736 | |||
| Essex | Glaseby 1777 | ||||
| Gloucester | Glasbe 1828 | Glasby 1831 | Glisbey 1824 | Glisby 1824 | |
| Hampshire | Glasbe 1801 | Glasbee 1763 | Glasbey 1832 | Glasbie 1633 | Glaseby 1841 |
| Glasby 1782 | Glasbye 1578 | Glassby 1812 | |||
| Hertford | Glasby 1823 | ||||
| Kent | Glasbee 1810 | Glasby 1734 | Glassby 1792 | Glazby 1732 | Glussby 1843 |
| Lancashire | Glasby 1798 | Glassby 1811 | Glazeby 1806 | Glesbie 1543 | |
| Lincoln | Glasburie 1577 | Glasby 1693 | Glasoubie 1600 | Glasoubye 1595 | Glassby 1772 |
| Gleasbie 1616 | |||||
| London | Glaisby 1778 | Glasbe 1753 | Glasbee 1746 | Glasbey 1682 | Glasebey 1708 |
| Glasby 1571 | Glaseby 1714 | Glassbe 1759 | Glassbee 1742 | Glassbey 1737 | |
| Glassby 1724 | Glaysbey 1737 | Glazeby 1687 | Glazby 1739 | Glosbey 1756 | |
| Glosby 1817 | Glossby 1715 | ||||
| Norfolk | Glassara 1754 | Glassby 1795 | Glazby 1762 | ||
| Northumberland | Glasbe 1641 | Glasbie 1617 | Glasby 1632 | Glesbey 1682 | |
| Nottinghamshire | Glasbie 1631 | Glasby 1754 | Glaseby 1722 | Glassby 1721 | Glazeby 1730 |
| Glosby 1820 | Glasbey 1806 | ||||
| Somerset | Glazby 1767 | ||||
| Stafford | Glasbey 1821 | Glasby 1815 | |||
| Surrey | Glaisby 1750 | Glasbry 1692 | Glasby 1776 | Glisbey 1859 | Glosby 1778 |
| Sussex | Glasby 1814 | Glosby 1749 | |||
| Warwick | Glasbey 1796 | Glasby 1792 | Glaseby 1849 | Glassbey 1809 | Glassby 1811 |
| Glosby 1803 | |||||
| Westmoreland | Gleasby 1789 | ||||
| Wiltshire | Glasby or Gillespy 1718 | ||||
| Worcester | Glasby 1802 | Glaspy 1802 | |||
| York | Glaisby 1719 | Glaissby 1749 | Glasby 1740 | Glasbey 1743 | Glaseby 1762 |
| Glasiby 1734 | Glassby 1724 | Glazby 1765 | Glazeby 1736 | Gleasbie 1620 | |
| Gleasby 1788 | Glissbie 1790 | Glosby 1807 |